Perhaps you should try some spelling variations:
petroiov » petrov (Expand Search), peteroiov (Expand Search), petrioiov (Expand Search), petrooiov (Expand Search)
petriiiiv » peteriiiiv (Expand Search), petriiiiiv (Expand Search), petroiiiiv (Expand Search)
petruiiov » peteruiiov (Expand Search), petriuiiov (Expand Search), petrouiiov (Expand Search)
petriuiiov » peteriuiiov (Expand Search), petriiuiiov (Expand Search), petroiuiiov (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (Expand Search)
petriu » peteriu (Expand Search), petriiu (Expand Search), petroiu (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 ((petriiiiv OR (petroiov OR (petruiiov OR petriuiiov))) OR ((petru OR petriu) OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((petriiiiv OR (petroiov OR (petruiiov OR petriuiiov))) OR ((petru OR petriu) OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((petriiiiv OR (petroiov OR (petruiiov OR petriuiiov))) OR ((petru OR petriu) OR petr)) o.s.*.