Perhaps you should try some spelling variations:
petruv » petru (Expand Search), petriuv (Expand Search), petruuv (Expand Search), petrouv (Expand Search)
petrov » petro (Expand Search), petriov (Expand Search), petruov (Expand Search), petroov (Expand Search)
petriov » petriiov (Expand Search), petruiov (Expand Search), petroiov (Expand Search)
petroiiov » petrioiiov (Expand Search), petruoiiov (Expand Search), petrooiiov (Expand Search)
petroui » petrioui (Expand Search), petruoui (Expand Search), petrooui (Expand Search)
petr » petri (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 ((petruv OR (petriov OR petroiiov)) OR ((petrov OR petroui) OR (petr OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruv OR (petriov OR petroiiov)) OR ((petrov OR petroui) OR (petr OR peter))) o.s.*".