Perhaps you should try some spelling variations:
cohen david » cohen daniel, loshin david
zhi forman » chris forman
john david » sahn david, juan david, jan david
young ghi » young choi, hong ghi, young hr
young get » young let, young ages, young men
fang yan » fang yuan, wang yan, wang yang
yan wang » yuan wang, yang yang, qian wang

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

• Performing a fuzzy search may retrieve terms with similar spellings: fang yan wang zhi forman ((john david) OR (cohen david)) ((young ghi) or (young get)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: fang yan wang zhi forman ((john david) OR (cohen david)) ((young ghi) OR (young get)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "fang yan wang zhi forman ((john david) OR (cohen david)) ((young ghi) or (young get)) ;*".