Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
truong cao » truong dai
trung cap » trung tam
trong tap » trong thap, tong tap, trong tan
tap toan » tap doan, tap quan, bai toan
toan cau » toan cao, toan ban, toan tap
ha tinh » va tinh, may tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu xanh) or (ha tinh)) - thanh ((truong cao) or (trung cap)) dung trong tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (ha tinh)) - thanh ((truong cao) OR (trung cap)) dung trong tap toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (ha tinh)) - thanh ((truong cao) or (trung cap)) dung trong tap toan cau*.