Perhaps you should try some spelling variations:
multilingues » multilingue
multilinguismo » multilingualism, multilingmismo, multilingiismo, multilingumismo, multilinguistmo, multilinguiso
{uml}uismo." » {uml}mismo.", {uml}iismo.", {uml}umismo.", {uml}uistmo.", {uml}uiso."
{uml}uisme." » {uml}usme."
{uml}ismo." » {uml}mismo.", {uml}istmo.", {uml}iso."
{uml}sismo." » {uml}smismo.", {uml}sistmo.", {uml}siso.", {uml}sismos.", {uml}mismo.", {uml}simo."

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