Perhaps you should try some spelling variations:
petriv » petri (Expand Search), petris (Expand Search), petrov (Expand Search), petriiv (Expand Search), petroiv (Expand Search), periv (Expand Search)
petruov » petrov (Expand Search), petriuov (Expand Search), petrouov (Expand Search), peruov (Expand Search), pentruov (Expand Search), petriov (Expand Search)
petriuiv » petriiuiv (Expand Search), petroiuiv (Expand Search), periuiv (Expand Search)
petruiiiv » petriuiiiv (Expand Search), petrouiiiv (Expand Search), peruiiiv (Expand Search), pentruiiiv (Expand Search), petriiiiv (Expand Search)
petr » petri (Expand Search), petro (Expand Search), per (Expand Search)
petru » petriu (Expand Search), petrou (Expand Search), peru (Expand Search), pentru (Expand Search), petri (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 (((petriv OR petriuiv) OR petruiiiv) OR (petruov OR ((petr OR petru) OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petriv OR petriuiv) OR petruiiiv) OR (petruov OR ((petr OR petru) OR peter))) o.s.*".