Perhaps you should try some spelling variations:
persa » persas, perla, versa
erba » yerba, verba, werba
verbos » veros, verbes, verdos, veryos, erbos, versos
erbos » eros, erbes, erdos
verb » ver, very, erb
verbo » vero, veryo, erbo, verso
vera » era, vega, ver
versos » versus, diversos

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: "Russian (((persa OR erba) OR (verbos OR erbos)) OR ((verb OR vera) OR (verbo OR versos)))~".
• Adding a wildcard symbol may retrieve word variants: Russian (((persa OR erba) OR (verbos OR erbos)) OR ((verb OR vera) OR (verbo OR versos)))*.