Perhaps you should try some spelling variations:
huang ting » huang jing, huang ying, huang bin
wang human » wang xueman, wang hua, facing human
human gene » human genome, human gender, human bone
yuan ting » yuan ming, yuan kang, yuan lin
ying john » king john, young john, ying jin
wong shiu » wong siu, song shin, wong sau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((yuan ting) OR (huang ting)) wang human gene ying john ((wong shiu) OR (cong shu)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yuan ting) or (huang ting)) wang human gene ying john ((wong shiu) OR (cong shu)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((yuan ting) or (huang ting)) wang human gene ying john ((wong shiu) OR (cong shu)) ;*.