Perhaps you should try some spelling variations:
"de communication israel" » "de communication issues", "de communication iran", "de communication iraq", "mobile communication israel", "online communication israel"
"mars cooperation history" » "mars corporation history", "mars federation history", "early cooperation history", "area cooperation history", "arab cooperation history"
"_ colonization still" » "_ colonization failed", "_ colonization israel", "_ colonization songs", "_ decolonization still", "decolonization _ 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: (((("mars cooperation history") or ("de communication israel"))) or ("_ colonization still"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mars cooperation history") OR ("de communication israel"))) OR ("_ colonization still")).
• Removing quotes may allow a broader search: (((( mars cooperation history ) or ( de communication israel ))) or ( _ colonization still )).
• Adding a wildcard symbol may retrieve word variants: (((("mars cooperation history") or ("de communication israel"))) or ("_ colonization still"))*.