Perhaps you should try some spelling variations:
"preparation from trace" » "preparation _ trace", "preparation a trace", "preparation from trade", "preparation from grace", "preparation from tree"
"partitioning a travail" » "partitioning _ travail", "partitioning au travail", "partitioning du travail", "partitioning de travail"
"partition a travail" » "partition _ travail", "partition au travail", "partition du travail", "partition de travail"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("preparation from trace") or ((("partitioning a travail") or ("partition a travail"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("preparation from trace") OR ((("partitioning a travail") OR ("partition a travail")))).
• Removing quotes may allow a broader search: (( preparation from trace ) or ((( partitioning a travail ) or ( partition a travail )))).
• Adding a wildcard symbol may retrieve word variants: (("preparation from trace") or ((("partitioning a travail") or ("partition a travail"))))*.