Perhaps you should try some spelling variations:
can survey » gian survey, main survey, fat survey
jiao yuan » xiao yuan, jiao yan, chiao yuan
chan wang » chen wang, chan kang, china wang
gan jiao » gao jia, ben jiao, ren jiao
yang zhi » yan zhi, liang zhi, yang chik
van en » van den, van een, van es
yan zi » yan zhi, yuan zi, ban zi

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 jiao yuan ((van en) OR (can survey)) chan wang ((((yang zhi) OR (wang zhi))) OR (yan zi)) ;~.
• Adding a wildcard symbol may retrieve word variants: gan jiao yuan ((van en) or (can survey)) chan wang ((((yang zhi) or (wang zhi))) or (yan zi)) ;*.