Perhaps you should try some spelling variations:
zhang ming » zhang xin
well zhang » well than
lanka how » land how, lane how, lanka p.w
ming cong » minh cong, ming kong, ming code
wing tan » wing ian, liang tan, hong tan
long tan » hong tan, long han, long thanh
how well » how we
cong van » congo can, duong van, cong sun

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wing tan) or (long tan)) lanka how well zhang ming cong van ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wing tan) OR (long tan)) lanka how well zhang ming cong van ;*.