Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
petrio » petri (Expand Search), petris (Expand Search), petro (Expand Search), petriio (Expand Search), petruio (Expand Search), petroio (Expand Search)
petr » petri (Expand Search), petru (Expand Search), petro (Expand Search)
petruiu » petriuiu (Expand Search), petruuiu (Expand Search), petrouiu (Expand Search)
petruiiu » petriuiiu (Expand Search), petruuiiu (Expand Search), petrouiiu (Expand Search)
petrouiiu » petriouiiu (Expand Search), petruouiiu (Expand Search), petroouiiu (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 (peterov OR (petrio OR ((petr OR (petruiu OR (petruiiu OR petrouiiu))) OR peter))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (peterov OR (petrio OR ((petr OR (petruiu OR (petruiiu OR petrouiiu))) OR peter))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (peterov OR (petrio OR ((petr OR (petruiu OR (petruiiu OR petrouiiu))) OR peter))) o.s.*.