Perhaps you should try some spelling variations:
petruv » petru (Expand Search), petrov (Expand Search), peteruv (Expand Search), petriuv (Expand Search), petruuv (Expand Search)
petrio » petri (Expand Search), petris (Expand Search), petro (Expand Search), peterio (Expand Search), petriio (Expand Search), petruio (Expand Search)
petriou » petriu (Expand Search), petrisu (Expand Search), petrou (Expand Search), peteriou (Expand Search), petriiou (Expand Search), petruiou (Expand Search)
petruuv » peteruuv (Expand Search), petriuuv (Expand Search), petruuuv (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 ((petruv OR petruuv) OR ((petrio OR petrio) OR (petr OR (petriou OR per)))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruv OR petruuv) OR ((petrio OR petrio) OR (petr OR (petriou OR per)))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruv OR petruuv) OR ((petrio OR petrio) OR (petr OR (petriou OR per)))) o.s.*.