Perhaps you should try some spelling variations:
hang zhang » zhang zhang, cheng zhang, huang chang
lung sang » aung san, lung can
sang minh » kang minah, anh minh, song min
minh chih » lin chih, ming shih
chih hang » chin chang, shih huang, chih yung
zhang wei » zhen wei
zhang ke » zhang joe, zhang lei, zhang mei

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

• Performing a fuzzy search may retrieve terms with similar spellings: lung sang minh chih hang zhang ke ((cong shu) or (zhang wei)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lung sang minh chih hang zhang ke ((cong shu) OR (zhang wei)) ;*.