Perhaps you should try some spelling variations:
"agriculture / sociological aspects / france" » "agriculture / psychological aspects / france"
"agriculture / ecological aspects / france" » "agriculture / biological aspects / france", "agriculture / psychological aspects / france", "agriculture / methodological aspects / france"
"agriculture / economic aspect / france" » "agriculture / economic aspects / france", "agriculture / economical aspects / france", "agriculture / economic prospects / france"

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: (("agriculture / economic aspect / france") OR ((("agriculture / ecological aspects / france") OR ("agriculture / sociological aspects / france")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"agriculture / economic aspect / france\") or (((\"agriculture / ecological aspects / france\") OR (\"agriculture / sociological aspects / france\"))))".
• Removing quotes may allow a broader search: (( agriculture / economic aspect / france ) or ((( agriculture / ecological aspects / france ) OR ( agriculture / sociological aspects / france )))).
• Adding a wildcard symbol may retrieve word variants: (("agriculture / economic aspect / france") or ((("agriculture / ecological aspects / france") OR ("agriculture / sociological aspects / france"))))*.