Perhaps you should try some spelling variations:
"re colonization still" » "re colonization failed", "re colonization israel", "re colonization songs", "pro colonization still", "_ colonization still", "jews colonization still"
"field observations state" » "field observation scale", "field observation status", "field observations samer"
"pro cooperation still" » "pro cooperation scale", "pro cooperation state", "pro cooperation studies", "group cooperation still", "area cooperation still", "arab cooperation still"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("pro cooperation still") OR ((("field observations state") OR ("re colonization still"))))~.
• Removing quotes may allow a broader search: (( pro cooperation still ) or ((( field observations state ) or ( re colonization still ))))~.
• Adding a wildcard symbol may retrieve word variants: (("pro cooperation still") or ((("field observations state") or ("re colonization still"))))*.