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