Perhaps you should try some spelling variations:
petrovu » petrovvu (Expand Search), petrivu (Expand Search), petruvu (Expand Search), peterovu (Expand Search), petriovu (Expand Search), petruovu (Expand Search)
petro » petrov (Expand Search), petri (Expand Search), petru (Expand Search), petero (Expand Search), petrio (Expand Search), petruo (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petrui » peterui (Expand Search), petriui (Expand Search), petruui (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 (petriov OR ((per OR petrovu) OR ((petro OR petrui) OR petr))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (petriov OR ((per OR petrovu) OR ((petro OR petrui) OR petr))) o.s.*".