Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trung » thanh trung, hanh trang, manh trung
hoc chieu » hoc thieu, ho chieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
cong tac » cong ty
toan ban » van ban

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 - hanh trung cua thong ((cong san) or (cong tac)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - hanh trung cua thong ((cong san) OR (cong tac)) toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - hanh trung cua thong ((cong san) or (cong tac)) toan ban*.