Perhaps you should try some spelling variations:
"china cooperation history" » "china corporation history", "china federation history", "asian cooperation history", "regional cooperation history"
"_ decolonization from" » "_ decolonisation from", "_ decolonization africa", "_ decolonization across"
"re colonization still" » "re colonization failed", "re colonization israel", "re colonization songs", "pro colonization still", "_ colonization still", "jews colonization 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: (((("_ decolonization from") OR ("re colonization still"))) OR ("china cooperation history"))~.
• Removing quotes may allow a broader search: (((( _ decolonization from ) or ( re colonization still ))) or ( china cooperation history ))~.
• Adding a wildcard symbol may retrieve word variants: (((("_ decolonization from") or ("re colonization still"))) or ("china cooperation history"))*.