Perhaps you should try some spelling variations:
multiling » multilingue
multilingues » multilingueues, multilingue, multilinguismo
{uml}uisme." » {uml}usme.", {uml}uismo."
{uml}umismo." » {uml}ummismo.", {uml}umsismo.", {uml}umistmo."
{uml}ismo." » {uml}mismo.", {uml}sismo.", {uml}istmo."
{uml}sistmo." » {uml}sismo.", {uml}istmo.", {uml}sisto."

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