Perhaps you should try some spelling variations:
petriiiv » peteriiiv (Expand Search), petriiiiv (Expand Search), petroiiiv (Expand Search)
petruv » peteruv (Expand Search), petriuv (Expand Search), petrouv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petrui » peterui (Expand Search), petriui (Expand Search), petroui (Expand Search)
petrouo » peterouo (Expand Search), petriouo (Expand Search), petroouo (Expand Search)
petriiuo » peteriiuo (Expand Search), petriiiuo (Expand Search), petroiiuo (Expand Search)
petr » peter (Expand Search), petri (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 ((petriiiv OR petruv) OR (((petru OR petrui) OR (petrouo OR petriiuo)) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiiv OR petruv) OR (((petru OR petrui) OR (petrouo OR petriiuo)) OR petr)) o.s.*".