Perhaps you should try some spelling variations:
multiling » multilingue
multilingues » multilingueues, multilingue, multilinguismo
{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."
{uml}simo." » {uml}simon.", {uml}sido.", {uml}sino."

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}mismo."))~.
• Removing quotes may allow a broader search: (multiling or multilingues)(({uml}uismo. or {uml}ismo. ) or ({uml}simo. or {uml}mismo. ))~.
• Adding a wildcard symbol may retrieve word variants: "(multiling or multilingues)(({uml}uismo." or {uml}ismo.") or ({uml}simo." or {uml}mismo."))*.