Perhaps you should try some spelling variations:
multiling » multilingue
multilingues » multilingueues, multilingue, multilinguismo
{uml}uismo." » {uml}mismo.", {uml}sismo.", {uml}uisme.", {uml}umismo.", {uml}usismo.", {uml}uistmo."
{uml}iismo." » {uml}mismo.", {uml}sismo.", {uml}itsmo.", {uml}imismo.", {uml}isismo.", {uml}iistmo."
{uml}isismo." » {uml}ismismo.", {uml}issismo.", {uml}isistmo."
{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)(({uml}uismo." or ({uml}iismo." OR {uml}isismo.")) or {uml}ismo.")~.
• If you are trying to use Boolean operators, they must be ALL CAPS: "(multiling OR multilingues)(({uml}uismo." or ({uml}iismo." OR {uml}isismo.")) or {uml}ismo.").
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"(multiling or multilingues)(({uml}uismo.\" or ({uml}iismo.\" OR {uml}isismo.\")) or {uml}ismo.\")".
• Removing quotes may allow a broader search: (multiling or multilingues)(({uml}uismo. or ({uml}iismo. OR {uml}isismo. )) or {uml}ismo. ).
• Adding a wildcard symbol may retrieve word variants: "(multiling or multilingues)(({uml}uismo." or ({uml}iismo." OR {uml}isismo.")) or {uml}ismo.")*.