Perhaps you should try some spelling variations:
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
hieu manh » hieu nganh, dieu hanh, hien hanh
trang va » tran van, hang va
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than man » than ma, thanh san, tran manh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((hieu manh) OR (chieu xanh))) or (chieu sang)) - hanh trang va nhung cong tac than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hieu manh) OR (chieu xanh))) OR (chieu sang)) - hanh trang va nhung cong tac than man*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((hieu manh) OR (chieu xanh))) or (chieu sang)) - hanh trang va nhung cong tac than man*".