Perhaps you should try some spelling variations:
nhanh dung » hanh dung, nhanh hung, thanh dung
nhanh dong » hanh dong, nhanh chong, anh dong
khong cong » thong cong, khong cang, chong cong
hieu xanh » chieu xanh, hieu manh, hieu nganh
cua khong » hua khong, cua phuong, cua thuong
doc hieu » toc thieu, hoc thieu, hoc hien
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - ((nhanh dung) OR (nhanh dong)) cua khong cong ((xuan toan) or (dan than)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - ((nhanh dung) OR (nhanh dong)) cua khong cong ((xuan toan) OR (dan than)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - ((nhanh dung) OR (nhanh dong)) cua khong cong ((xuan toan) or (dan than)) tap".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - ((nhanh dung) OR (nhanh dong)) cua khong cong ((xuan toan) or (dan than)) tap*.