Perhaps you should try some spelling variations:
petruv » peteruv (Expand Search), petriuv (Expand Search), petruuv (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petruiiov » peteruiiov (Expand Search), petriuiiov (Expand Search), petruuiiov (Expand Search)
petruui » peteruui (Expand Search), petriuui (Expand Search), petruuui (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 ((petruv OR ((petriov OR petruov) OR petruiiov)) OR ((petero OR petruui) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruv OR ((petriov OR petruov) OR petruiiov)) OR ((petero OR petruui) OR petr)) o.s.*".