Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, hieu manh
chieu tinh » trieu tinh, lieu tinh, chau tinh
dung cong » dung trong
tung cao » truong cao, trung cap, quang cao
nung cao » nang cao, nhung cau, quang cao
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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: theo ((chieu xanh) OR (chieu tinh)) - thanh ((tung cao) or (nung cao)) dung cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu tinh)) - thanh ((tung cao) OR (nung cao)) dung cong tac toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) OR (chieu tinh)) - thanh ((tung cao) or (nung cao)) dung cong tac toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) OR (chieu tinh)) - thanh ((tung cao) or (nung cao)) dung cong tac toan cao*.