Perhaps you should try some spelling variations:
literature survey » literature series, literacy survey
mega literature » legal literature, a literature, beat literature
gary literature » gray literature, grey literature, earth literature
world mega » world manga, world metal
world gary » world scary, world gas

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( world mega literature survey ) or ( world gary literature survey ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( world mega literature survey ) OR ( world gary literature survey )).
• Adding a wildcard symbol may retrieve word variants: (( world mega literature survey ) or ( world gary literature survey ))*.