I'm going to send a second reply, this one directed to general principles of deer hunting, because you suggested that you may not have been taught the fundamentals very well. First, I'm no expert and my success is probably more a result of hunting an ground with a lot of deer on it rather than my excellent hunting abilities. The best advice is to find some hunting grounds that contains the animals you are seeking!
To fundamentals. Deer are prey species. They eat vegetables and carnivores eat them. Consequently they are cautious and much of their behavior is directed to avoid being killed and eaten. They eat in very first light and in very last light. During the middle part of the day they lie on beds chewing their cud -- regurgitated food which they chewed off during feeding and stored in a first stomach (they have four) undigested -- and drowsing. Hunters are well advised to locate themselves along the paths between feeding areas and bedding areas at first light and last light for best opportunities to shoot a deer. The first two hours of legal hunting light and the last two hours of legal hunting light are likely to be the best times, when deer are most active. Be advised that during full moon or near full moon the deer are likely to eat by moonlight, fill their bellys, and go to their bedding areas while it is still dark. This means twilight movement will be well below expected activity levels. Then all you can do is try to still hunt them in their bedding areas, hoping to see them before they see you or to take one with a snap shot. I am NOT successful in this kind of still hunting activity.
Deer have very acute senses, particularly the sense of smell. Thus, you want to locate yourself so the wind is blowing into your face when you face the direction you expect the deer to appear from . When you move, move very slowlyl, thereby making it more difficult for deer to see you. If you need to itch your nose, move your hand slowly. Wear a face net to prevent your face from "flashing" as you turn your head. Your skin is very reflective and as you turn your head the reflectivity level changes dramatically, presenting a noticeable "flash" to any animal looking at you.
Locate yourself in shadow to make it more difficult for deer to see you. Locate yourself with objects behind you to break up your outline. Locate yourself with objects in front of you screening your feet, lower legs, and lower torso from the view of the deer. If possible, locate yourself with objects partially screening your upper body and head, as well, but allowing for necessary shooting lanes. Wear gloves on your hands to avoid the reflective appearance of skin announcing your presence to the deer.
Get to your chosen location an hour before shooting light in the morning and three hours before the end of legal shooting light at the end of the day. Sit still. Don't make noise. Dress warmly so you can be comfortable. Being cold is going to make it difficult to sit still.
You need to hunt in the right places, where deer move. If there is a lot of hunter pressure in your area this will upset deer patterns you may be able to determine during pre-season scouting. Look particularly for "funnels," places where for one reason or another deer are encouraged to move through -- a narrow place along a stream bank where it is easy to go from the first bank, to the stream, to the second bank easily; a narrow strip of cover between two large areas of cover. Locate an ambush looking over such "funnels" that will naturally attract concentrations of deer movement.
Talk with other successful hunters.