Perhaps you should try some spelling variations:
"serie lectura de clases." » "serie lecturas de clases.", "semir lectura de clases.", "serra lectura de clases.", "serie lectura de clase.", "serie lectura de bases."
"serie actas la clase." » "serie letras la clase.", "serie fichas la clase.", "serie actos la clase.", "serie lacteas la clase.", "serie actas de clase."
"serie actis la clase." » "serie actos la clase.", "serie activos la clase.", "serie mutis la clase."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("serie actas la clase.") OR ("serie actis la clase."))) or ("serie lectura de clases."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("serie actas la clase.") OR ("serie actis la clase."))) OR ("serie lectura de clases.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"serie actas la clase.\") OR (\"serie actis la clase.\"))) or (\"serie lectura de clases.\"))".
• Removing quotes may allow a broader search: (((( serie actas la clase. ) OR ( serie actis la clase. ))) or ( serie lectura de clases. )).
• Adding a wildcard symbol may retrieve word variants: (((("serie actas la clase.") OR ("serie actis la clase."))) or ("serie lectura de clases."))*.