Talvez debería tentar con algunhas variantes ortográficas:
"preparation from trial" » "preparation _ trial", "preparation a trial", "preparation from aerial", "preparation from serial", "preparation from tridax"
"preparation from traffic" » "preparation _ traffic", "preparation a traffic", "preparation from paraffin", "preparation from graffiti", "preparation term traffic"
"repartition des travail" » "repartition de travail", "repartition du travail", "repartition des travaux"

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 trial") or ("preparation from traffic"))) or ("repartition des travail"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("preparation from trial") OR ("preparation from traffic"))) OR ("repartition des travail"))*.
• Removing quotes may allow a broader search: (((( preparation from trial ) or ( preparation from traffic ))) or ( repartition des travail ))*.