Perhaps you should try some spelling variations:
nang cong » nang song, dang cong, bang cong
hieu quan » hieu qua, lieu quan, thien quan
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man
ho hieu » ho chieu, hoi hieu, nho hieu
bang da » bong da, ban da, tang da
bang va » hang va, trang va, dang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu quan - anh ((bang da) or (((bang va) OR (ban va)))) nang cong dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu quan - anh ((bang da) OR (((bang va) OR (ban va)))) nang cong dan than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu quan - anh ((bang da) or (((bang va) OR (ban va)))) nang cong dan than ban".
• Adding a wildcard symbol may retrieve word variants: ho hieu quan - anh ((bang da) or (((bang va) OR (ban va)))) nang cong dan than ban*.