Perhaps you should try some spelling variations:
chin chang » china chang, chain change, china zhang
wang qian » wang qiao, wang qin, wang liang
ying yang » yang yang, yin yang, ying chang
qian yan » qian jun, qian yi
yan guan » gan guan, yan yuan, yang guang
tan yang » dan yang, tan ying, tao yang
tan yong » tan hong, tan kong, tan ying

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: wang qian yan guan ((tan yang) OR (tan yong)) ((chin chang) OR (ying yang)) (hai OR hadi) ;~.
• Adding a wildcard symbol may retrieve word variants: wang qian yan guan ((tan yang) or (tan yong)) ((chin chang) or (ying yang)) (hai or hadi) ;*.