Perhaps you should try some spelling variations:
petriuov » petrov (Expand Search), peteriuov (Expand Search), petriiuov (Expand Search), petruiuov (Expand Search)
petrouov » petrov (Expand Search), peterouov (Expand Search), petriouov (Expand Search), petruouov (Expand Search)
petriov » peteriov (Expand Search), petriiov (Expand Search), petruiov (Expand Search)
petriiiov » peteriiiov (Expand Search), petriiiiov (Expand Search), petruiiiov (Expand Search)
petroiiiov » peteroiiiov (Expand Search), petrioiiiov (Expand Search), petruoiiiov (Expand Search)
petroi » peteroi (Expand Search), petrioi (Expand Search), petruoi (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petru (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: fop ((petriuov OR ((petriov OR petrouov) OR (petriiiov OR petroiiiov))) OR (petroi OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriuov OR ((petriov OR petrouov) OR (petriiiov OR petroiiiov))) OR (petroi OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriuov OR ((petriov OR petrouov) OR (petriiiov OR petroiiiov))) OR (petroi OR petr)) o.s.*.