Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
cua thuong » cua phuong, ca thuong, cua huong
cua truong » cua trung, xuan truong, cac truong
hoc chieu » hoc thieu, ho chieu, hoc hien
tong tap » tuong tac, trong tan, cong tac
tap toan » tap doan, tap quan, bai toan
toan cao » toan ban, toan tap

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 - hanh trinh ((cua thuong) OR (cua truong)) tong tap toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - hanh trinh ((cua thuong) OR (cua truong)) tong tap toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh trinh ((cua thuong) OR (cua truong)) tong tap toan cao*.