Perhaps you should try some spelling variations:
petrov » petro (Expand Search), peterov (Expand Search), petriov (Expand Search), petroov (Expand Search)
petruv » peteruv (Expand Search), petriuv (Expand Search), petrouv (Expand Search), petriv (Expand Search)
petriou » peteriou (Expand Search), petriiou (Expand Search), petroiou (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search), petri (Expand Search)
peteri » peterdi (Expand Search), peter (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 ((petruv OR peruv) OR ((petrov OR petriou) OR (petr OR ((petru OR peteri) OR pentru)))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruv OR peruv) OR ((petrov OR petriou) OR (petr OR ((petru OR peteri) OR pentru)))) o.s.*".