Perhaps you should try some spelling variations:
petruov » peteruov (Expand Search), petriuov (Expand Search), petruuov (Expand Search)
petriiv » peteriiv (Expand Search), petriiiv (Expand Search), petruiiv (Expand Search)
petruuiv » peteruuiv (Expand Search), petriuuiv (Expand Search), petruuuiv (Expand Search)
petriuiv » peteriuiv (Expand Search), petriiuiv (Expand Search), petruiuiv (Expand Search)
petruiuiv » peteruiuiv (Expand Search), petriuiuiv (Expand Search), petruuiuiv (Expand Search)
petruui » peteruui (Expand Search), petriuui (Expand Search), petruuui (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 ((petruov OR (petriiv OR (petruuiv OR (petriuiv OR petruiuiv)))) OR (petruui OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petruov OR (petriiv OR (petruuiv OR (petriuiv OR petruiuiv)))) OR (petruui OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petruov OR (petriiv OR (petruuiv OR (petriuiv OR petruiuiv)))) OR (petruui OR petr)) o.s.*.