Perhaps you should try some spelling variations:
"political scientists" » "political activists", "political identity"
"political sciences" » "policy sciences"
"political changes" » "political change", "political challenges", "geopolitical change"
"politcal science" » "political scene", "social science", "policy sciences"
"politicl science" » "politics since", "political scene", "policy sciences"
"policy science" » "policy sciences", "policy since"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("political science") or ((((("politcal science") or ((("policy science") or ("politicl science"))))) or ((((("political sciences") OR ("political changes"))) or ("political scientists"))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("political science") OR ((((("politcal science") OR ((("policy science") OR ("politicl science"))))) OR ((((("political sciences") OR ("political changes"))) OR ("political scientists")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"political science\") or (((((\"politcal science\") or (((\"policy science\") or (\"politicl science\"))))) or (((((\"political sciences\") OR (\"political changes\"))) or (\"political scientists\"))))))".
• Removing quotes may allow a broader search: (( political science ) or ((((( politcal science ) or ((( policy science ) or ( politicl science ))))) or ((((( political sciences ) OR ( political changes ))) or ( political scientists )))))).
• Adding a wildcard symbol may retrieve word variants: (("political science") or ((((("politcal science") or ((("policy science") or ("politicl science"))))) or ((((("political sciences") OR ("political changes"))) or ("political scientists"))))))*.