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"
"mars cooperation history" » "mars corporation history", "mars federation history", "early cooperation history", "area cooperation history", "arab cooperation history"
"anti colonization israel" » "anti communication israel", "anti colonization still", "anti colonization history", "its colonization israel", "africa colonization israel", "_ colonization israel"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("mars cooperation history") OR ("c's communication issues"))) OR ("anti colonization israel"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"mars cooperation history\") OR (\"c's communication issues\"))) OR (\"anti colonization israel\"))".
• Removing quotes may allow a broader search: (((( mars cooperation history ) OR ( c's communication issues ))) OR ( anti colonization israel )).
• Adding a wildcard symbol may retrieve word variants: (((("mars cooperation history") OR ("c's communication issues"))) OR ("anti colonization israel"))*.