Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
tong thuong » thong thuong, trong thuong, cong thuong
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh sinh » hanh tinh, hanh dinh, hinh sinh
manh toan » thanh toan, anh tuan, tinh toan
sinh cua » manh cua, dinh cuu, sinh va
cua tong » cua cong, cua dong, cua nong
dan toan » van toan, dan than, xuan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (thien thanh)) - hanh sinh cua tong thuong ((dan toan) or (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (thien thanh)) - hanh sinh cua tong thuong ((dan toan) OR (manh toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (thien thanh)) - hanh sinh cua tong thuong ((dan toan) or (manh toan)) cau*.