Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, chen zheng
zhang dort » zhang robert
die smart » der smart
tan yang » dan yang, tan yong, tao yang
tan ying » fan ying, ran ying, tan yong
sein die » sein de, sein eine, sein des
dort ii » dort bin, dort hin

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tan yang) or (tan ying)) sein die smart cheng zhang dort ii ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tan yang) OR (tan ying)) sein die smart cheng zhang dort ii ;*.