Perhaps you should try some spelling variations:
childrens studies » children's studies, childrens stories, children's stories
african political » american political, african politics, africa politics
chickens studies » chickens studieson, thickness studies, chicano studies

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((chickens studies) OR (childrens studies)) in african political*.