Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thong cong » trong cong, tong cong, thong thong
lieu tinh » trieu tinh, diep tinh, bien tinh
ganh nang » nganh nong, van nang, sach nang
anh nang » anh bang, anh dang, anh sang
va thong » va thuong, va phuong, he thong
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cao » toan cao, thai cao, than cap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (lieu tinh)) - ((anh nang) OR (ganh nang)) va thong cong tac than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (lieu tinh)) - ((anh nang) OR (ganh nang)) va thong cong tac than cao~".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (lieu tinh)) - ((anh nang) OR (ganh nang)) va thong cong tac than cao*.