Perhaps you should try some spelling variations:
petroov » petrovov (Expand Search), petriov (Expand Search), petrov (Expand Search)
petro » petrov (Expand Search), petri (Expand Search), petr (Expand Search)
petruooov » pentruooov (Expand Search), petriooov (Expand Search)
petrui » pentrui (Expand Search), petrii (Expand Search)
petruoi » pentruoi (Expand Search), petrioi (Expand Search)
petruuoooi » pentruuoooi (Expand Search), petriuoooi (Expand Search)
petru » pentru (Expand Search), petri (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petroov OR petruooov) OR ((petrui OR (petruoi OR petruuoooi)) OR (petro OR petru))) o.s.~".
• Adding a wildcard symbol may retrieve word variants: fop ((petroov OR petruooov) OR ((petrui OR (petruoi OR petruuoooi)) OR (petro OR petru))) o.s.*.