Perhaps you should try some spelling variations:
transformations used » transformations und, transformations under, transformation based
transfer fair » transfer factor, transfer layer, transfer from
de skills » a skills, 2 skills, 1 skills
12 skills » 2 skills, 108 skills, a skills
used can » used car, uses can, users can
guias 5 » guiada 5, guias de
fair 5 » fair _, fair 4, fair 6

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( guias 5 _ transformations used can ) or ( aguas ((de skills) OR (12 skills)) transfer fair 5 ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( guias 5 _ transformations used can ) OR ( aguas ((de skills) OR (12 skills)) transfer fair 5 ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( guias 5 _ transformations used can ) or ( aguas ((de skills) OR (12 skills)) transfer fair 5 ))*".