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"
"pro cooperation case" » "pro cooperation _", "group cooperation case", "area cooperation case", "arab cooperation case"
"mars operation state" » "mars operations state", "mars operation stage", "mars cooperation state", "market operation state", "early operation state", "gas operations state"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"pro cooperation case\") OR (((\"mars operation state\") OR (\"re colonization still\"))))~".
• Removing quotes may allow a broader search: (( pro cooperation case ) OR ((( mars operation state ) OR ( re colonization still ))))~.
• Adding a wildcard symbol may retrieve word variants: (("pro cooperation case") OR ((("mars operation state") OR ("re colonization still"))))*.