Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trung » thanh trung, hanh trang, manh trung
thong cong » trong cong, tong cong, thong thong
tam thong » tam thuong, tao thong, nam thong
cua sinh » hoa sinh, va sinh
cong tac » cong ty
tac toan » tap toan, tam toan, hach 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 (cua sinh)) - hanh trung tam thong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (cua sinh)) - hanh trung tam thong cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (cua sinh)) - hanh trung tam thong cong tac toan cau*.