Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hung cuong » hung vuong, hong cuong, hung luong
hien xanh » hien hanh, chieu xanh, hien khanh
hanh dung » thanh dung, anh dung, hanh dong
hung cong » nhung cong, phung cong, dung cong
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) or (hien nhanh)) - hanh dung luan ((hung cong) OR (hung cuong)) dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien nhanh)) - hanh dung luan ((hung cong) OR (hung cuong)) dan chan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien nhanh)) - hanh dung luan ((hung cong) OR (hung cuong)) dan chan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien nhanh)) - hanh dung luan ((hung cong) OR (hung cuong)) dan chan cau*.