Perhaps you should try some spelling variations:
"re communication theory" » "re communication technology", "de communication theory", "true communication theory", "une communication theory"
"_ cooperation history" » "_ corporation history", "_ federation history"
"pro colonization still" » "pro colonization failed", "pro colonization israel", "pro colonization songs", "bio colonization still", "re colonization still", "mars colonization still"

Try widening your search to All Fields.

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

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