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