Perhaps you should try some spelling variations:
"ecologie / methodological" » "ecologies / methodological", "ecologic / methodological", "ecologist / methodological", "ecologie / methodologies"
"ecologie / methodology" » "ecologies / methodology", "ecologic / methodology", "ecologist / methodology"

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: (("ecologie / methodological") OR ("ecologie / methodology")).
• Removing quotes may allow a broader search: (( ecologie / methodological ) or ( ecologie / methodology )).
• Adding a wildcard symbol may retrieve word variants: (("ecologie / methodological") or ("ecologie / methodology"))*.