Perhaps you should try some spelling variations:
petrovuv » petrov (Expand Search), petrovvuv (Expand Search), petruvuv (Expand Search), peterovuv (Expand Search), petruovuv (Expand Search), perovuv (Expand Search)
peru » petru (Expand Search), per (Expand Search)
petro » petrov (Expand Search), petru (Expand Search), petero (Expand Search), petruo (Expand Search), pero (Expand Search)
petruv » peteruv (Expand Search), petruuv (Expand Search), peruv (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), peri (Expand Search)
petr » peter (Expand Search), petru (Expand Search), per (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop ((petruv OR petrovuv) OR (((petri OR peteri) OR peru) OR (petro OR petr))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruv OR petrovuv) OR (((petri OR peteri) OR peru) OR (petro OR petr))) o.s.*".