Perhaps you should try some spelling variations:
petrouv » petrov (Expand Search), petruouv (Expand Search), petroouv (Expand Search), perouv (Expand Search)
petriov » petrov (Expand Search), petruiov (Expand Search), petroiov (Expand Search), periov (Expand Search)
petrouiiov » petruouiiov (Expand Search), petroouiiov (Expand Search), perouiiov (Expand Search)
petri » petrui (Expand Search), petroi (Expand Search), peri (Expand Search)
petroui » petruoui (Expand Search), petrooui (Expand Search), peroui (Expand Search)
petr » petru (Expand Search), petro (Expand Search), per (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 ((petrouv OR (petriov OR petrouiiov)) OR ((petri OR petroui) OR (petr OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petrouv OR (petriov OR petrouiiov)) OR ((petri OR petroui) OR (petr OR peter))) o.s.*".