Perhaps you should try some spelling variations:
"tecnica education adult." » "technical education adult.", "tecnica educativa adult.", "tecnicas educativas adult."
"tecnica education parent." » "technical education parent.", "tecnica educativa parent.", "tecnicas educativas parent.", "tecnica education spain.", "tecnica educacion para.", "tecnica education latin."
"tecnica education cuba." » "technical education cuba.", "tecnica educativa cuba.", "tecnicas educativas cuba."

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: (((("tecnica education adult.") OR ("tecnica education parent."))) or ("tecnica education cuba."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tecnica education adult.") OR ("tecnica education parent."))) OR ("tecnica education cuba.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"tecnica education adult.\") OR (\"tecnica education parent.\"))) or (\"tecnica education cuba.\"))".
• Removing quotes may allow a broader search: (((( tecnica education adult. ) OR ( tecnica education parent. ))) or ( tecnica education cuba. )).
• Adding a wildcard symbol may retrieve word variants: (((("tecnica education adult.") OR ("tecnica education parent."))) or ("tecnica education cuba."))*.