Perhaps you should try some spelling variations:
multiling » multilingues
multilingue » multilinguesue
{uml}uistmo." » {uml}istmo.", {uml}uismo."
{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 multilingue)(({uml}uistmo.\" or {uml}ismo.\") OR ({uml}simo.\" or {uml}simon.\"))~".
• Removing quotes may allow a broader search: (multiling OR multilingue)(({uml}uistmo. or {uml}ismo. ) OR ({uml}simo. or {uml}simon. ))~.
• Adding a wildcard symbol may retrieve word variants: "(multiling OR multilingue)(({uml}uistmo." or {uml}ismo.") OR ({uml}simo." or {uml}simon."))*.