Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
nhanh dung » nhanh dong, hanh dung, nhanh hung
khong cong » thong cong, khong cang, chong cong
cua khong » hua khong, cua phuong, cua thuong
dung cua » dung luan, dung cho
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: hoc ((thieu xanh) OR (chieu xanh)) - nhanh dung cua khong cong ((xuan toan) or (dan than)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - nhanh dung cua khong cong ((xuan toan) OR (dan than)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (chieu xanh)) - nhanh dung cua khong cong ((xuan toan) or (dan than)) tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (chieu xanh)) - nhanh dung cua khong cong ((xuan toan) or (dan than)) tap*.