Perhaps you should try some spelling variations:
ban zhang » bin zhang, yan zhang, ban chiang
gong gang » hong gang, gong qiang, gongs gong
yan guan » gan guan, yan yuan, yang guang
guan hua » tuan hua, gui hua, tan hua
zhang li » zhang lei, zhang lin, zhang i
gong min » jong min, song min, gong meng
wan yan » wang yan, nan yan, wai yan

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan yan guan hua ban zhang li ((gong min) or (gong gang)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan yan guan hua ban zhang li ((gong min) OR (gong gang)) ;*.