Perhaps you should try some spelling variations:
chiet tach » chieu sach
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trung » thanh trung, hanh trang, manh trung
trung tuan » trung thanh, trung tam, tran tuan
tuan dung » tuan duong, tran dung, tan dung
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tan hang » tan khang, ban hang, van hang
hang dau » hang va, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chiet tach) or (chieu sang)) - hanh trung tuan dung cong tan hang dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chiet tach) OR (chieu sang)) - hanh trung tuan dung cong tan hang dau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chiet tach) or (chieu sang)) - hanh trung tuan dung cong tan hang dau*.