Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
trung tuan » trung thanh, trung tam, tran tuan
truong cua » truong ca, truong quan, truong cao
trong van » trong cac
ho chieu » theo chieu, hoc thieu, doi chieu
van toan » van tuan, van tan, van thanh
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 - hanh ((trung tuan) or (truong cua)) dung trong van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - hanh ((trung tuan) OR (truong cua)) dung trong van toan cau*.