I need a ready research

Hi
I need help because English as foreign language for me .....
I am studing the psycholinguistics and the teacher asked me to write a research 20 pages in the following titles ...
Research in psycholinguistics about :-

Diachronic
Synchronic
acquisition
Cooing
Marginal babbling
Canonical babbling
Developmental psycholinguistics
???????????????????????????????????
I am waiting for your help