Perhaps you should try some spelling variations:
multiling » multilingue
multilingues » multilingueues, multilingue, multilinguismo
{uml}uismo." » {uml}mismo.", {uml}sismo.", {uml}iismo.", {uml}umismo.", {uml}usismo.", {uml}uistmo."
{uml}ismo." » {uml}mismo.", {uml}sismo.", {uml}istmo."
{uml}simo." » {uml}simon.", {uml}sido."
{uml}sino." » {uml}sin.", {uml}nino.", {uml}sido."

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

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