Perhaps you should try some spelling variations:
multiling » multilingue
multilingues » multilingueues, multilingue, multilinguismo
{uml}ismo." » {uml}istmo.", {uml}iso."
{uml}mismo." » {uml}mistmo.", {uml}miso."
{uml}sismo." » {uml}sistmo.", {uml}siso.", {uml}sismos.", {uml}simo."
{uml}mistmo." » {uml}istmo."

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}ismo." or ({uml}mismo." OR {uml}mistmo.")) or {uml}sismo.")~.
• If you are trying to use Boolean operators, they must be ALL CAPS: "(multiling OR multilingues)(({uml}ismo." or ({uml}mismo." OR {uml}mistmo.")) or {uml}sismo.")*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"(multiling or multilingues)(({uml}ismo.\" or ({uml}mismo.\" OR {uml}mistmo.\")) or {uml}sismo.\")*".
• Removing quotes may allow a broader search: (multiling or multilingues)(({uml}ismo. or ({uml}mismo. OR {uml}mistmo. )) or {uml}sismo. )*.