Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua
cong doan » cong dan, dong doanh, cong san
cong hoan » cong hoa, dong hoa, cong san
hoc hieu » hoc thieu, hoc hien, doc hieu
manh cua » doanh cua, ban cua
va ban » van ban, va bai, va bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu lang - canh ((tranh cua) or (manh cua)) nhung ((cong doan) OR (cong hoan)) va ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - canh ((tranh cua) OR (manh cua)) nhung ((cong doan) OR (cong hoan)) va ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu lang - canh ((tranh cua) or (manh cua)) nhung ((cong doan) OR (cong hoan)) va ban".
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - canh ((tranh cua) or (manh cua)) nhung ((cong doan) OR (cong hoan)) va ban*.