Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
hanh trinh » canh tranh, hanh chinh
hieu lang » hieu quang, nhieu tang, hieu van
hang cong » dang cong, hang nong, bang cong
trinh va » trinh van, trinh vat, trinh ve
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cap » khan cap, thanh lap, thanh cac
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sang) or (hieu lang)) - hanh trinh va hang cong tac than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (hieu lang)) - hanh trinh va hang cong tac than cap.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (hieu lang)) - hanh trinh va hang cong tac than cap*.