Perhaps you should try some spelling variations:
known about » know about
yang guang » yang yang, yan guan, yang liang
huang jing » huang ting, huang ying, wang jing
jing known » king know
li zhang » _ zhang
gan guan » yan guan, quan guan, gui guan
fan guon » yan guan
d huang » dr huang, 16 huang

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

• Performing a fuzzy search may retrieve terms with similar spellings: li zhang ((yang guang) or (((gan guan) OR (fan guon)))) d huang jing known about ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: li zhang ((yang guang) OR (((gan guan) OR (fan guon)))) d huang jing known about ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "li zhang ((yang guang) or (((gan guan) OR (fan guon)))) d huang jing known about ;*".