Perhaps you should try some spelling variations:
petriiov » peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petruuuov » peteruuuov (Expand Search), petriuuuov (Expand Search), petruuuuov (Expand Search)
petrov » peterov (Expand Search), petriov (Expand Search), petruov (Expand Search)
petriuo » peteriuo (Expand Search), petriiuo (Expand Search), petruiuo (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (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 ((petriiov OR (petruov OR petruuuov)) OR (((petrov OR petriuo) OR petriuo) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiov OR (petruov OR petruuuov)) OR (((petrov OR petriuo) OR petriuo) OR petr)) o.s.*".