Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
manh trung » manh tung, thanh trung, manh hung
trung tai » truong tai, trung tam, trung dai
tong cong » trong cong, cong cong, dung cong
cua tinh » cua sinh, va tinh, ha tinh
tai tong » tai trong, tai cong, tai truong
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 sang) or (cua tinh)) - manh trung tai tong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (cua tinh)) - manh trung tai tong cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (cua tinh)) - manh trung tai tong cong tac toan cau*.