Perhaps you should try some spelling variations:
"politico psychological bulletin" » "positive psychological bulletin", "policy psychological bulletin", "pollution psychological bulletin", "politico psychological burden", "politico hydrological bulletin", "politico psychological baseline"
"politics psychological bulletin" » "politics psychological burden", "politics hydrological bulletin", "politics psychological baseline", "policy psychological bulletin", "pollution psychological bulletin", "utilities psychological bulletin"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"politico psychological bulletin\") OR (\"politics psychological bulletin\"))".
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