Perhaps you should try some spelling variations:
"american and comparative environmentals policy" » "american and comparative environmental policy", "american and cooperative environments policy", "american and operative environmental policy", "american and comparative enviromental policy", "american and comparative environmental politics"
"american and competitive environments policy" » "american and competitive environment policy", "american and cooperative environments policy", "american and computing environments policy", "american and competitive environmental policy", "american and competitive environments privacy", "american and competitive environments project"
"american and cooperative environment policy" » "american and cooperative environments policy", "american and competitive environment policy", "american and comparative environmental policy", "american and cooperative environmental policy", "american and cooperative environmental politics", "american and cooperative environmental policies"

Try widening your search to All Fields.

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 comparative environmentals policy") OR ((("american and cooperative environment policy") OR ("american and competitive environments policy")))).
• Removing quotes may allow a broader search: (( american and comparative environmentals policy ) or ((( american and cooperative environment policy ) or ( american and competitive environments policy )))).
• Adding a wildcard symbol may retrieve word variants: (("american and comparative environmentals policy") or ((("american and cooperative environment policy") or ("american and competitive environments policy"))))*.