Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, hieu cach
chieu sang » hieu lang, nhieu tang
chieu xanh » chieu tinh, hieu manh
canh trang » canh tranh, hanh trang, banh trang
nhung cong » dung cong, thong cong, hang cong
trang va » tran van, hang va
cong tan » cong tac, cong san, cong thanh
tan chan » dan chan, ban chan, can chan
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 sach) or (((chieu sang) OR (chieu xanh)))) - canh trang va nhung cong tan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (((chieu sang) OR (chieu xanh)))) - canh trang va nhung cong tan chan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (((chieu sang) OR (chieu xanh)))) - canh trang va nhung cong tan chan cau*".