Perhaps you should try some spelling variations:
"cuadernos tecnicos de bellas artes ;" » "cuadernos practicos de bellas artes ;", "cuadernos biblicos de bellas artes ;", "cuadernos tecnicos de las artes ;", "cuadernos tecnicas de bellas artes ;", "cuadernos tecnico de bellas artes ;", "cuadernos tecnica de bellas artes ;"
"modelos matematicos de bellas artes ;" » "modelos matematicas de bellas artes ;", "modelos matematica de bellas artes ;", "modelos matematicas en bellas artes ;", "modelos matematicos de las artes ;"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("cuadernos tecnicos de bellas artes ;") or ("modelos matematicos de bellas artes ;"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("cuadernos tecnicos de bellas artes ;") OR ("modelos matematicos de bellas artes ;")).
• Removing quotes may allow a broader search: (( cuadernos tecnicos de bellas artes ; ) or ( modelos matematicos de bellas artes ; )).
• Adding a wildcard symbol may retrieve word variants: (("cuadernos tecnicos de bellas artes ;") or ("modelos matematicos de bellas artes ;"))*.