Perhaps you should try some spelling variations:
del marcco » del marco, el marco
wang liang » wang yang
liang fan » liang dan, liang tan, zhang fan
yan yong » yan cong, tan yong, wang yong
del mary » del mar, beal mary, del marco
fan guo » fan guon, quan guo
guo yan » kuo ryan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang liang fan guo yan yong ((del marcco) or (del mary)) (hai or hari) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang fan guo yan yong ((del marcco) OR (del mary)) (hai OR hari) ;*.