Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
toc chieu » toc thieu, doc hieu, hoc thieu
dung cong » dung trong
cach ban » cac ban, cach ben, cach van
cach bao » cach nao, sach bao, cach giao
cua dung » cua dang, cua dong, qua dung
sat phan » vat phan, xuat phan, va phan
sat nhan » hat nhan, ca nhan, tao nhan

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: toc chieu xanh - ((cach ban) OR (cach bao)) cua dung cong ((sat phan) OR (sat nhan)) lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc chieu xanh - ((cach ban) or (cach bao)) cua dung cong ((sat phan) OR (sat nhan)) lap~".
• Adding a wildcard symbol may retrieve word variants: toc chieu xanh - ((cach ban) or (cach bao)) cua dung cong ((sat phan) OR (sat nhan)) lap*.