Perhaps you should try some spelling variations:
literature series » literature survey
movies literature » review literature, goes literature, series literature
gray literature » grey literature, general literature
world movies » world moving, world soviet, world series
world gray » world grain, world great, 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 movies literature series ) or ( world gray literature series ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( world movies literature series ) OR ( world gray literature series )).
• Adding a wildcard symbol may retrieve word variants: (( world movies literature series ) or ( world gray literature series ))*.