I don't know about the other models, but my LG Optimus L3 2 doesn't vibrate while touching the virtual keyboard. That's really bad, because it's annoying to hear a sound to make sure the key was pressed. Since I couldn't find any option to activate that, I tried another keyboard available in market and it worked, but I still don't have vibration while pressing the return key. Is there a way to activate vibration for all keys in the device?
Have you tried the Go Keyboard?
I use Go Keyboard on Samsung Galaxy S4. It vibrates when I press the return key. It's customizable via
Sound and vibrate > Key press vibrate. You might also want to check
Advanced Setting > Smiley Setting; this lets you merge the Smiley and the return key function.