Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
chieu xanh » chieu sach, chieu sang, chieu tinh
thong cong » trong cong, thong thong, phong chong
chau tinh » cuu tinh, ha tinh, cua tinh
tong cong » trong cong, cong cong, dung cong
tan toan » tan tran, tap toan, van toan
toan cau » 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) or (chau tinh)) - hanh trung tam ((thong cong) OR (tong cong)) tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chau tinh)) - hanh trung tam ((thong cong) OR (tong cong)) tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chau tinh)) - hanh trung tam ((thong cong) OR (tong cong)) tan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chau tinh)) - hanh trung tam ((thong cong) OR (tong cong)) tan toan cau*.