Perhaps you should try some spelling variations:
pero » petro (Expand Search), per (Expand Search), pro (Expand Search)
petrui » petru (Expand Search), peterui (Expand Search), petruui (Expand Search), petroui (Expand Search)
petriuv » peteriuv (Expand Search), petruiuv (Expand Search), petroiuv (Expand Search)
petrouo » peterouo (Expand Search), petruouo (Expand Search), petroouo (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (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 ((peteruv OR petriuv) OR ((((pero OR petrouo) OR petrouo) OR petrui) OR (petr OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((peteruv OR petriuv) OR ((((pero OR petrouo) OR petrouo) OR petrui) OR (petr OR petri))) o.s.*".