Perhaps you should try some spelling variations:
multiling » multilingue, multilingues
multilingismo » multilingueismo, multilinguesismo, multilinguismo, multilinguisme, multilinguista
{uml}uismo." » {uml}mismo.", {uml}ismo.", {uml}uisme."
{uml}iismo." » {uml}mismo.", {uml}ismo.", {uml}itsmo."
{uml}sismo." » {uml}sismos.", {uml}mismo.", {uml}simo."

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 multilingismo)((({uml}uismo." or {uml}iismo.") OR {uml}istmo.") or {uml}sismo.")~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"(multiling OR multilingismo)((({uml}uismo.\" or {uml}iismo.\") OR {uml}istmo.\") or {uml}sismo.\")".
• Removing quotes may allow a broader search: (multiling OR multilingismo)((({uml}uismo. or {uml}iismo. ) OR {uml}istmo. ) or {uml}sismo. ).
• Adding a wildcard symbol may retrieve word variants: "(multiling OR multilingismo)((({uml}uismo." or {uml}iismo.") OR {uml}istmo.") or {uml}sismo.")*.