Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
tranh xuan » tran xuan, tranh luan, thanh xuan
xuan nhung » quan nhung, xuan chung, xuan hung
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, hien khanh
manh toan » thanh toan, anh tuan

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 (chieu xanh)) - canh tranh xuan nhung cong ((manh toan) OR (tinh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu xanh)) - canh tranh xuan nhung cong ((manh toan) OR (tinh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (chieu xanh)) - canh tranh xuan nhung cong ((manh toan) OR (tinh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu xanh)) - canh tranh xuan nhung cong ((manh toan) OR (tinh toan)) cau*.