Perhaps you should try some spelling variations:
petriiov » petrov (Expand Search), peteriiov (Expand Search), petriiiov (Expand Search), petruiiov (Expand Search)
petriuiiov » peteriuiiov (Expand Search), petriiuiiov (Expand Search), petruiuiiov (Expand Search)
petriuuiiov » peteriuuiiov (Expand Search), petriiuuiiov (Expand Search), petruiuuiiov (Expand Search)
petriuio » peteriuio (Expand Search), petriiuio (Expand Search), petruiuio (Expand Search)
petruuio » peteruuio (Expand Search), petriuuio (Expand Search), petruuuio (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 (petriuiiov OR petriuuiiov)) OR ((petriuio OR petruuio) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiov OR (petriuiiov OR petriuuiiov)) OR ((petriuio OR petruuio) OR petr)) o.s.*".