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"
"its colonization israel" » "its communication israel", "its colonization still", "its colonization history", "anti colonization israel", "jews colonization israel", "mars 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 ("its colonization israel"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mars cooperation history") OR ("c's communication issues"))) OR ("its colonization israel")).
• Removing quotes may allow a broader search: (((( mars cooperation history ) or ( c's communication issues ))) or ( its colonization israel )).
• Adding a wildcard symbol may retrieve word variants: (((("mars cooperation history") or ("c's communication issues"))) or ("its colonization israel"))*.