Perhaps you should try some spelling variations:
"contemporary matter's thinking" » "contemporary patterns thinking", "contemporary materials thinking", "contemporary water thinking", "contemporary pattern thinking", "contemporary maternal thinking", "contemporary better thinking"
"contemporary masters thinking" » "contemporary western thinking", "contemporary writers thinking", "contemporary markets thinking", "contemporary jaspers thinking", "contemporary patterns thinking", "contemporary systems thinking"

Try widening your search to All Fields.

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"contemporary masters thinking\") OR (\"contemporary matter's thinking\"))".
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