Perhaps you should try some spelling variations:
"its communication theory" » "its communication technology", "nets communication theory", "c's communication theory", "mass communication theory"
"its cooperation history" » "its corporation history", "its federation history", "city cooperation history", "et cooperation history"
"its colonization still" » "its colonization failed", "its colonization israel", "its colonization songs", "anti colonization still", "jews colonization still", "mars 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: (((("its communication theory") or ("its colonization still"))) or ("its cooperation history"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("its communication theory") OR ("its colonization still"))) OR ("its cooperation history")).
• Removing quotes may allow a broader search: (((( its communication theory ) or ( its colonization still ))) or ( its cooperation history )).
• Adding a wildcard symbol may retrieve word variants: (((("its communication theory") or ("its colonization still"))) or ("its cooperation history"))*.