If you list your computer specs including case model it will help to provide a mental image of what your rig looks like. This helps provide the best information in return for intake and exhaust recommendations.
But to try and answer the question as best as I can with what you have provided, yes, most commonly cases feature cold air intake from the front and side with exhaust in the rear and top. Adding additional fans (unless you are disrupting circulation) almost always increases case flow. Lowering temperatures.