Perhaps you should try some spelling variations:
"its communication theory" » "its communication technology", "nets communication theory", "c's communication theory", "mass communication theory"
"jews colonization songs" » "jews colonization still", "jews colonization work", "jews decolonization notes", "its colonization songs", "mars colonization songs", "re colonization songs"
"anti colonialism israel" » "anti colonization israel", "_ anticolonialism israel", "anti colonial israel", "neo colonialism israel"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("jews colonization songs") or ("anti colonialism israel"))) or ("its communication theory"))~.
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• Adding a wildcard symbol may retrieve word variants: (((("jews colonization songs") or ("anti colonialism israel"))) or ("its communication theory"))*.