Perhaps you should try some spelling variations:
cua phuong » cuu phuong, cuc phuong, luan phuong
hieu xanh » chieu xanh, hieu manh, hieu nganh
hanh dung » thanh dung, anh dung, hanh dong
cua khong » hua khong, cua thuong, cua cong
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 - hanh dung ((cua khong) OR (cua phuong)) cong ((xuan toan) or (dan than)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh dung ((cua khong) OR (cua phuong)) cong ((xuan toan) OR (dan than)) tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh dung ((cua khong) OR (cua phuong)) cong ((xuan toan) or (dan than)) tap*".