Perhaps you should try some spelling variations:
petria » petris (Expand Search), petra (Expand Search), petruia (Expand Search), petroia (Expand Search), peria (Expand Search)
petriv » petris (Expand Search), petrov (Expand Search), petruiv (Expand Search), petroiv (Expand Search), periv (Expand Search)
petriu » petru (Expand Search), petris (Expand Search), petruiu (Expand Search), petroiu (Expand Search), periu (Expand Search)
petroov » petrov (Expand Search), petruoov (Expand Search), petrooov (Expand Search), peroov (Expand Search)
petri » petrui (Expand Search), petroi (Expand Search), peri (Expand Search)
petrioia » petruioia (Expand Search), petroioia (Expand Search), perioia (Expand Search)
petr » petru (Expand Search), petro (Expand Search), per (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 ((((((petri OR (petria OR petrioia)) OR petriv) OR petriu) OR petroov) OR petr) OR peter) o.s.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fop ((((((petri OR (petria OR petrioia)) OR petriv) OR petriu) OR petroov) OR petr) OR peter) o.s.".
• Adding a wildcard symbol may retrieve word variants: fop ((((((petri OR (petria OR petrioia)) OR petriv) OR petriu) OR petroov) OR petr) OR peter) o.s.*.