Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
trung tuan » trung thanh, trung tam, truong thanh
tran tuan » tran xuan, tran quang, tran thanh
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
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: ho chieu sang - thanh ((trung tuan) or (tran tuan)) dung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh ((trung tuan) OR (tran tuan)) dung cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh ((trung tuan) or (tran tuan)) dung cong tac toan cau*.