Perhaps you should try some spelling variations:
petroiov » petrov (Expand Search), peteroiov (Expand Search), petrioiov (Expand Search), petrooiov (Expand Search)
petruov » peteruov (Expand Search), petriuov (Expand Search), petrouov (Expand Search)
petriuiiv » peteriuiiv (Expand Search), petriiuiiv (Expand Search), petroiuiiv (Expand Search)
petriuiv » peteriuiv (Expand Search), petriiuiv (Expand Search), petroiuiv (Expand Search)
petriiuiv » peteriiuiv (Expand Search), petriiiuiv (Expand Search), petroiiuiv (Expand Search)
petru » peteru (Expand Search), petriu (Expand Search), petrou (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 (((petroiov OR petruov) OR (petriuiiv OR (petriuiv OR petriiuiv))) OR (petru OR petr)) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (((petroiov OR petruov) OR (petriuiiv OR (petriuiv OR petriiuiv))) OR (petru OR petr)) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (((petroiov OR petruov) OR (petriuiiv OR (petriuiv OR petriiuiv))) OR (petru OR petr)) o.s.*.