Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
petrou » petru (Expand Search), petro (Expand Search), petrov (Expand Search), peterou (Expand Search), petruou (Expand Search), petroou (Expand Search)
petriiiio » peteriiiio (Expand Search), petruiiiio (Expand Search), petroiiiio (Expand Search)
petruuiiio » peteruuiiio (Expand Search), petruuuiiio (Expand Search), petrouuiiio (Expand Search)
petriuuiiio » peteriuuiiio (Expand Search), petruiuuiiio (Expand Search), petroiuuiiio (Expand Search)
petr » peter (Expand Search), petru (Expand Search), petro (Expand Search)
petri » peteri (Expand Search), petrui (Expand Search), petroi (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 ((petrou OR (petriiiio OR (petruuiiio OR petriuuiiio))) OR (petr OR petri))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (peterov OR ((petrou OR (petriiiio OR (petruuiiio OR petriuuiiio))) OR (petr OR petri))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (peterov OR ((petrou OR (petriiiio OR (petruuiiio OR petriuuiiio))) OR (petr OR petri))) o.s.*.