Perhaps you should try some spelling variations:
multiling » multilingue
multilingues » multilingueues, multilingue, multilinguismo
{uml}uisme." » {uml}usme.", {uml}uismo."
{uml}ismo." » {uml}mismo.", {uml}istmo.", {uml}iso."
{uml}sismo." » {uml}smismo.", {uml}sistmo.", {uml}siso.", {uml}sismos.", {uml}mismo.", {uml}simo."
{uml}sino." » {uml}sin.", {uml}nino.", {uml}sido."

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