Perhaps you should try some spelling variations:
"kriminalitat informatique / enquetes" » "criminalite informatique / enquetes", "criminalistique informatique / enquetes"
"criminelles informatique / enquetes" » "criminalite informatique / enquetes", "rationnelles informatique / enquetes", "formelles informatique / enquetes"

Try widening your search to All Fields.

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"kriminalitat informatique / enquetes\") OR (\"criminelles informatique / enquetes\"))".
• Removing quotes may allow a broader search: (( kriminalitat informatique / enquetes ) OR ( criminelles informatique / enquetes )).
• Adding a wildcard symbol may retrieve word variants: (("kriminalitat informatique / enquetes") OR ("criminelles informatique / enquetes"))*.