Perhaps you should try some spelling variations:
multiling » multilingue
multilingues » multilingueues, multilingue, multilinguismo
multilingual » multilingueual, multilingue, multilineal, multilingualism
{uml}uismo." » {uml}mismo.", {uml}sismo.", {uml}iismo.", {uml}umismo.", {uml}usismo.", {uml}uistmo."
{uml}uistmo." » {uml}istmo."
{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: "((multiling OR multilingues) or multilingual)(({uml}uismo." or {uml}uistmo.") or {uml}ismo.")~.
• If you are trying to use Boolean operators, they must be ALL CAPS: "((multiling OR multilingues) or multilingual)(({uml}uismo." OR {uml}uistmo.") or {uml}ismo.").
• Removing quotes may allow a broader search: ((multiling OR multilingues) or multilingual)(({uml}uismo. or {uml}uistmo. ) or {uml}ismo. ).
• Adding a wildcard symbol may retrieve word variants: "((multiling OR multilingues) or multilingual)(({uml}uismo." or {uml}uistmo.") or {uml}ismo.")*.