Perhaps you should try some spelling variations:
"re decolonization islam" » "re decolonization from", "re decolonization _", "re colonization israel", "_ decolonization islam", "box decolonization islam", "war decolonization islam"
"re colonization history" » "re communication history", "re organization history", "re cooperation history", "pro colonization history", "_ colonization history", "jews colonization history"
"de communication theory" » "de communication technology", "mobile communication theory", "online communication theory"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("re decolonization islam") or ("re colonization history"))) or ("de communication theory"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("re decolonization islam") OR ("re colonization history"))) OR ("de communication theory"))*.
• Removing quotes may allow a broader search: (((( re decolonization islam ) or ( re colonization history ))) or ( de communication theory ))*.