Perhaps you should try some spelling variations:
multiling » multilingue
multilingues » multilingueues, multilingue, multilinguismo
{uml}uismo." » {uml}sismo.", {uml}uisme.", {uml}usismo.", {uml}uistmo.", {uml}uiso."
{uml}iismo." » {uml}sismo.", {uml}itsmo.", {uml}isismo.", {uml}iistmo.", {uml}iiso."
{uml}ismo." » {uml}sismo.", {uml}istmo.", {uml}iso."
{uml}mismo." » {uml}msismo.", {uml}mistmo.", {uml}miso."

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}uismo." or ({uml}iismo." OR {uml}ismo.")) or {uml}mismo.")~.
• If you are trying to use Boolean operators, they must be ALL CAPS: "(multiling OR multilingues)(({uml}uismo." or ({uml}iismo." OR {uml}ismo.")) or {uml}mismo.").
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"(multiling or multilingues)(({uml}uismo.\" or ({uml}iismo.\" OR {uml}ismo.\")) or {uml}mismo.\")".
• Removing quotes may allow a broader search: (multiling or multilingues)(({uml}uismo. or ({uml}iismo. OR {uml}ismo. )) or {uml}mismo. ).
• Adding a wildcard symbol may retrieve word variants: "(multiling or multilingues)(({uml}uismo." or ({uml}iismo." OR {uml}ismo.")) or {uml}mismo.")*.