Perhaps you should try some spelling variations:
nhanh duong » nhanh dong, thanh duong, nhanh chuong
khanh duong » thanh duong, khanh thuong, khanh phong
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
nhung cong » dung cong, thong cong, hang cong
cong tac » cong ty
tac chan » tac chuan, tac can, tac chon
chan cau » phan cau, can cau, chinh cau

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 sang)) - ((nhanh duong) or (khanh duong)) va nhung cong tac chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sang)) - ((nhanh duong) OR (khanh duong)) va nhung cong tac chan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) OR (chieu sang)) - ((nhanh duong) or (khanh duong)) va nhung cong tac chan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) OR (chieu sang)) - ((nhanh duong) or (khanh duong)) va nhung cong tac chan cau*.