Perhaps you should try some spelling variations:
multiling » multilingue
multilingues » multilingueues, multilingue, multilinguismo
{uml}uismo." » {uml}mismo.", {uml}iismo.", {uml}uisme.", {uml}umismo.", {uml}uistmo.", {uml}uiso."
{uml}ismo." » {uml}mismo.", {uml}istmo.", {uml}iso."
{uml}sismo." » {uml}smismo.", {uml}sistmo.", {uml}siso.", {uml}sismos.", {uml}mismo.", {uml}simo."

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "\"(multiling or multilingues)(({uml}uismo.\" OR {uml}ismo.\") or {uml}sismo.\")~".
• Removing quotes may allow a broader search: (multiling or multilingues)(({uml}uismo. OR {uml}ismo. ) or {uml}sismo. )~.
• Adding a wildcard symbol may retrieve word variants: "(multiling or multilingues)(({uml}uismo." OR {uml}ismo.") or {uml}sismo.")*.