Perhaps you should try some spelling variations:
cheng sang » cheng zhang, chen yang, chen wang
sang minh » kang minah, anh minh, song min
minh kong » minh cong, ming kong, king kong
chong yi » chong yah, chong yun, hong yu
yu cheng » yu chen, _ cheng
kong yue » wong yue, kong your, kong yam
yang yi » yang di, yang xi, yang jui

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong ((chong yi) or (yang yi)) yu cheng sang minh kong yue ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong ((chong yi) OR (yang yi)) yu cheng sang minh kong yue ;.
• Adding a wildcard symbol may retrieve word variants: dong ((chong yi) or (yang yi)) yu cheng sang minh kong yue ;*.