Perhaps you should try some spelling variations:
wang liang » wang yang
song minh » sang minh, song min, song ming
minh long » minh cong, vinh long
kim song » kim young, kim eung
long shu » cong shu, tong shui, long du
yang yi » yang di, yang jui
yang xi » yang di, 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: wang liang ((yang yi) or (yang xi)) kim song minh long shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang ((yang yi) OR (yang xi)) kim song minh long shu ;.
• Adding a wildcard symbol may retrieve word variants: wang liang ((yang yi) or (yang xi)) kim song minh long shu ;*.