Perhaps you should try some spelling variations:
multilingues » multilinguismo
{uml}iismo." » {uml}mismo.", {uml}sismo.", {uml}itsmo.", {uml}imismo.", {uml}isismo.", {uml}iistmo."
{uml}usismo." » {uml}lusismos.", {uml}usmismo.", {uml}ussismo.", {uml}usistmo."
{uml}miso." » {uml}mismo.", {uml}misio.", {uml}omiso."
{uml}ismo." » {uml}mismo.", {uml}sismo.", {uml}istmo."

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: "(multilingue or multilingues)((({uml}iismo." or {uml}usismo.") or {uml}miso.") or {uml}ismo.")~.
• If you are trying to use Boolean operators, they must be ALL CAPS: "(multilingue OR multilingues)((({uml}iismo." or {uml}usismo.") OR {uml}miso.") or {uml}ismo.").
• Removing quotes may allow a broader search: (multilingue or multilingues)((({uml}iismo. or {uml}usismo. ) or {uml}miso. ) or {uml}ismo. ).
• Adding a wildcard symbol may retrieve word variants: "(multilingue or multilingues)((({uml}iismo." or {uml}usismo.") or {uml}miso.") or {uml}ismo.")*.