Perhaps you should try some spelling variations:
multiling » multilingue
multilingues » multilingueues, multilingue, multilinguismo
{uml}iismo." » {uml}mismo.", {uml}sismo.", {uml}itsmo.", {uml}imismo.", {uml}isismo.", {uml}iistmo."
{uml}ismo." » {uml}mismo.", {uml}sismo.", {uml}istmo."
{uml}simo." » {uml}sido.", {uml}sino."
{uml}simon." » {uml}sidon.", {uml}sinon."

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