I have a number of questions for you that might help us zero in a little bit more. I'd also suggest skipping chips entirely. As someone else (effectively) said, those are probably just acting like kindling and when they burn up they take your chunks with them.
* How many ounces of wood are you using? It's far more often that we have to convince people to use less wood, but try anywhere from 5-10 oz. total of 2-3 oz chunks.
* What species of wood are you using? Something like hickory is going to give you a stronger flavor than say apple or cherry.
* What is the source of your wood and how old is it? If the wood is super dry then there's going to be a higher chance of combustion and possibly less smoke. I successfully use big box store chunks, so it can be done.
* Where are you putting the chunks in the fire box? I tend to evenly space the chunks. The element won't be the same temperature everywhere, so some of the chunks will smoke faster than others. Spreading them out takes advantage of this and the isolation can help keep all of them burning up if one of them catches fire.
* As someone else said/asked... are you starting with a cold smoker and cold meat? I only have a single recipe where I ever start with a warm smoker. 99.9% of the time you're just going to want it to be cold.
* These smokers do their best when you open the door twice... once to put stuff in and once to take stuff out. If you're opening it any other time then you're letting out smoke, moisture, and heat which is going to adversely effect the result. I say this as kindly as I can... if you're micro-managing it then leave it the hell alone.

Get a good meter and let it tell you when the internal temp of the meat hits an appropriate target.
* Is it safe to assume you're not doing anything that is impacting the airflow in the smoker? Do you have the drain hole poked open if you've foiled the bottom? Is the smoke hole at the top clear? Not running any kind of fan that would be forcing a faster air exchange?
Other than not feeling you're getting enough smoke, how is whatever you're smoking turning out? Is it moist? Is it tender? What are you smoking and what is the internal temp of the meat when you pull it out? Are you resting the meat or are you going directly from smoker to plate?