Perhaps you should try some spelling variations:
"c's communication issues" » "c's community issues", "c's communication india", "c's communication united", "lea's communication issues", "class communication issues", "mass communication issues"
"et cooperation history" » "et corporation history", "et federation history", "et cooperations history", "eu cooperation history", "2 cooperation history"
"re colonization still" » "re colonization failed", "re colonization israel", "re colonization songs", "pro colonization still", "_ colonization still", "jews colonization still"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("c's communication issues") or ("re colonization still"))) or ("et cooperation history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("c's communication issues") OR ("re colonization still"))) OR ("et cooperation history")).
• Removing quotes may allow a broader search: (((( c's communication issues ) or ( re colonization still ))) or ( et cooperation history )).
• Adding a wildcard symbol may retrieve word variants: (((("c's communication issues") or ("re colonization still"))) or ("et cooperation history"))*.