Perhaps you should try some spelling variations:
mestral » bimestral (Expand Search)
semestral » sebimestral (Expand Search), bimestral (Expand Search)
sebimestral » sebibimestral (Expand Search), bimestral (Expand Search)
bisemestral » bisebimestral (Expand Search), bibimestral (Expand Search), bimestral (Expand Search)
bibimestral » bibibimestral (Expand Search), bimestral (Expand Search)
bisebimestral » bisebibimestral (Expand Search), bibimestral (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mestral OR (semestral OR sebimestral)) OR ((bisemestral OR bibimestral) OR bisebimestral)) universidad~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mestral OR (semestral OR sebimestral)) OR ((bisemestral OR bibimestral) OR bisebimestral)) universidad".
• Adding a wildcard symbol may retrieve word variants: ((mestral OR (semestral OR sebimestral)) OR ((bisemestral OR bibimestral) OR bisebimestral)) universidad*.