Perhaps you should try some spelling variations:
multiling » multilingue, multilingues
multilinguismo » multilingueuismo, multilinguesuismo, multilingualism, multilingumismo, multilingusismo, multilinguistmo
{uml}iismo." » {uml}mismo.", {uml}sismo.", {uml}itsmo.", {uml}imismo.", {uml}isismo.", {uml}iistmo."
{uml}ismo." » {uml}mismo.", {uml}sismo.", {uml}istmo."
{uml}miso." » {uml}mismo.", {uml}misio.", {uml}omiso."
{uml}siso." » {uml}sismo.", {uml}sieso.", {uml}sido."

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