Perhaps you should try some spelling variations:
"colegios profesionales colex-data ;" » "los profesionales colex-data ;" (Expand Search), "colegios profesionales como-data ;" (Expand Search), "colegios profesionales de-data ;" (Expand Search), "colegios profesionales del-data ;" (Expand Search)
"colegios profesionales en-data ;" » "los profesionales en-data ;" (Expand Search), "colegios profesional en-data ;" (Expand Search), "colegios profesionales de-data ;" (Expand Search), "colegios profesional de-data ;" (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("colegios profesionales colex-data ;") OR ("colegios profesionales en-data ;"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"colegios profesionales colex-data ;\") OR (\"colegios profesionales en-data ;\"))".
• Removing quotes may allow a broader search: (( colegios profesionales colex-data ; ) OR ( colegios profesionales en-data ; )).
• Adding a wildcard symbol may retrieve word variants: (("colegios profesionales colex-data ;") OR ("colegios profesionales en-data ;"))*.