Perhaps you should try some spelling variations:
"american and comparative environmental policy" » "american and corporate environmental policy", "american and cooperative environments policy", "american and competitive environments policy"
"american and competitive environment policy" » "american and computing environment policy", "american and competitive environmental politics", "american and competitive environmental policies"
"american and cooperative environment policy" » "american and cooperative environments policy", "american and competitive environments policy", "american and operating environment policy", "american and cooperative environmental politics", "american and cooperative environmental policies"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("american and competitive environment policy") OR ((("american and cooperative environment policy") OR ("american and comparative environmental policy"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"american and competitive environment policy\") or (((\"american and cooperative environment policy\") OR (\"american and comparative environmental policy\"))))*".
• Removing quotes may allow a broader search: (( american and competitive environment policy ) or ((( american and cooperative environment policy ) OR ( american and comparative environmental policy ))))*.