Perhaps you should try some spelling variations:
peterov » petrov (Expand Search)
pero » petro (Expand Search), per (Expand Search), pro (Expand Search)
petriu » petru (Expand Search), petris (Expand Search), petruiu (Expand Search), petroiu (Expand Search), periu (Expand Search)
petruo » petru (Expand Search), petro (Expand Search), petruuo (Expand Search), petrouo (Expand Search), peruo (Expand Search)
petroiuo » petruoiuo (Expand Search), petrooiuo (Expand Search), peroiuo (Expand Search)
petr » petru (Expand Search), petro (Expand Search), per (Expand Search)
petri » petrui (Expand Search), petroi (Expand Search), peri (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 ((((pero OR petriu) OR petruo) OR petroiuo) OR (petr OR (petri OR peter)))) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop (peterov OR ((((pero OR petriu) OR petruo) OR petroiuo) OR (petr OR (petri OR peter)))) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop (peterov OR ((((pero OR petriu) OR petruo) OR petroiuo) OR (petr OR (petri OR peter)))) o.s.*.