Perhaps you should try some spelling variations:
can serve » can service, can survey, can save
chan wang » chen wang, chan kang, china wang
gan qian » gan guan, gan jiao, jun qian
qian yan » qian jun, qian yi
yang zhi » wang zhi, liang zhi, yang chik
van een » van den, van beek
yan zhi » yan zi, wang zhi
van es » van nes, man es

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: gan qian yan ((((van es) OR (van een))) OR (can serve)) chan wang ((yang zhi) OR (yan zhi)) ;~.
• Adding a wildcard symbol may retrieve word variants: gan qian yan ((((van es) or (van een))) or (can serve)) chan wang ((yang zhi) or (yan zhi)) ;*.