Perhaps you should try some spelling variations:
recherche act » recherche macht, recherche nach, recherche face
recherche et » recherche sur
recherche de » recherche sur
act final » act fiscal, action final

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: (( les ports de recherche act final ) OR ( les ports _ ((recherche et) OR (recherche de)) fin )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( les ports de recherche act final ) or ( les ports _ ((recherche et) OR (recherche de)) fin ))".
• Adding a wildcard symbol may retrieve word variants: (( les ports de recherche act final ) or ( les ports _ ((recherche et) OR (recherche de)) fin ))*.