Perhaps you should try some spelling variations:
"german ethnicity questions." » "german ethnicity question.", "german ethical questions.", "german ethnic question.", "german authenticity questions.", "gender ethnicity questions.", "given ethnicity questions."
"given ethnic relations." » "given economic relations.", "given public relations.", "given ethnicity relations.", "level ethnic relations.", "iv ethnic relations."
"cohen ethnic relations." » "cohen economic relations.", "cohen public relations.", "co ethnic relations.", "other ethnic relations."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("german ethnicity questions.") or ((("given ethnic relations.") OR ("cohen ethnic relations."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("german ethnicity questions.") OR ((("given ethnic relations.") OR ("cohen ethnic relations.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"german ethnicity questions.\") or (((\"given ethnic relations.\") OR (\"cohen ethnic relations.\"))))".
• Removing quotes may allow a broader search: (( german ethnicity questions. ) or ((( given ethnic relations. ) OR ( cohen ethnic relations. )))).
• Adding a wildcard symbol may retrieve word variants: (("german ethnicity questions.") or ((("given ethnic relations.") OR ("cohen ethnic relations."))))*.