Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » 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 ((lieu tinh) or (((chieu sach) OR (chieu sang)))) - nhanh quang _ nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((lieu tinh) OR (((chieu sach) OR (chieu sang)))) - nhanh quang _ nhung cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((lieu tinh) or (((chieu sach) OR (chieu sang)))) - nhanh quang _ nhung cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((lieu tinh) or (((chieu sach) OR (chieu sang)))) - nhanh quang _ nhung cong tac toan cau*.