Perhaps you should try some spelling variations:
petrouov » petrov (Expand Search), peterouov (Expand Search), petriouov (Expand Search), petroouov (Expand Search)
peri » petri (Expand Search), per (Expand Search)
petroov » peteroov (Expand Search), petrioov (Expand Search), petrooov (Expand Search)
petruiu » peteruiu (Expand Search), petriuiu (Expand Search), petrouiu (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petrui » peterui (Expand Search), petriui (Expand Search), petroui (Expand Search)
petr » peter (Expand Search), petri (Expand Search), petro (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 ((petrouov OR petroov) OR (petruiu OR ((petru OR (petrui OR peri)) OR petr))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petrouov OR petroov) OR (petruiu OR ((petru OR (petrui OR peri)) OR petr))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petrouov OR petroov) OR (petruiu OR ((petru OR (petrui OR peri)) OR petr))) o.s.*.