Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, chen zheng
cheng yang » chen yang, chen wang, cheng han
yang yang » wang yang, wang yan
wang tan » wang yan, wang ban, wang tao
wang dan » wang yan, wang ban, wang yidan
yang 8 » yang _
8 main » 1 main, 2 main, 3 main

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang tan) or (wang dan)) ((cheng yang) OR (cheng zhang)) yang yang 8 main (hat or what) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang tan) OR (wang dan)) ((cheng yang) OR (cheng zhang)) yang yang 8 main (hat OR what) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang tan) or (wang dan)) ((cheng yang) OR (cheng zhang)) yang yang 8 main (hat or what) ;*".