Perhaps you should try some spelling variations:
multiling » multilingue, multilingues
multilinguismo » multilingueuismo, multilinguesuismo, multilingualism
{uml}sismo." » {uml}mismo.", {uml}simo."
{uml}sismos." » {uml}mismos.", {uml}simos."
{uml}sistmo." » {uml}istmo."
{uml}sisto." » {uml}visto.", {uml}sixto.", {uml}sist."

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: "(multiling or multilinguismo)({uml}sismo." or (({uml}sistmo." or {uml}sisto.") or {uml}sismos."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: "(multiling OR multilinguismo)({uml}sismo." or (({uml}sistmo." OR {uml}sisto.") or {uml}sismos.")).
• Removing quotes may allow a broader search: (multiling or multilinguismo)({uml}sismo. or (({uml}sistmo. or {uml}sisto. ) or {uml}sismos. )).
• Adding a wildcard symbol may retrieve word variants: "(multiling or multilinguismo)({uml}sismo." or (({uml}sistmo." or {uml}sisto.") or {uml}sismos."))*.