Perhaps you should try some spelling variations:
multiling » multilingue
multilingues » multilingueues, multilingue
multilinguismo » multilingueuismo, multilingualism, multilingsismo, multilingiismo, multilinguisme, multilingusismo, multilinguistmo, multilinguiso
{uml}uismo." » {uml}sismo.", {uml}iismo.", {uml}uisme.", {uml}usismo.", {uml}uistmo.", {uml}uiso."
{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) or multilinguismo)(({uml}uismo." OR {uml}ismo.") or {uml}mismo.")~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((multiling or multilingues) or multilinguismo)(({uml}uismo.\" OR {uml}ismo.\") or {uml}mismo.\")".
• Removing quotes may allow a broader search: ((multiling or multilingues) or multilinguismo)(({uml}uismo. OR {uml}ismo. ) or {uml}mismo. ).
• Adding a wildcard symbol may retrieve word variants: "((multiling or multilingues) or multilinguismo)(({uml}uismo." OR {uml}ismo.") or {uml}mismo.")*.