Perhaps you should try some spelling variations:
multiling » multilingue, multilingues
multilinguismo » multilingueuismo, multilinguesuismo, multilingualism, multilingumismo, multilingusismo, multilinguistmo
{uml}uiso." » {uml}quiso.", {uml}guiso.", {uml}uismo."
{uml}ismo." » {uml}mismo.", {uml}sismo.", {uml}istmo."
{uml}mistmo." » {uml}mismo.", {uml}istmo."

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 multilinguismo)({uml}uiso." or (({uml}ismo." OR {uml}iso.") or {uml}mistmo."))~.
• Removing quotes may allow a broader search: (multiling or multilinguismo)({uml}uiso. or (({uml}ismo. or {uml}iso. ) or {uml}mistmo. ))~.
• Adding a wildcard symbol may retrieve word variants: "(multiling or multilinguismo)({uml}uiso." or (({uml}ismo." or {uml}iso.") or {uml}mistmo."))*.