Perhaps you should try some spelling variations:
peri » per (Expand Search)
petroov » peteroov (Expand Search), petruoov (Expand Search), petrooov (Expand Search)
petruov » peteruov (Expand Search), petruuov (Expand Search), petrouov (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (Expand Search)
petriu » peteriu (Expand Search), petruiu (Expand Search), petroiu (Expand Search)
petriiu » peteriiu (Expand Search), petruiiu (Expand Search), petroiiu (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (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 ((petroov OR petruov) OR ((((peri OR petri) OR petriu) OR (petriu OR petriiu)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petroov OR petruov) OR ((((peri OR petri) OR petriu) OR (petriu OR petriiu)) OR petr)) o.s.*".