Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
manh trung » manh tung, thanh trung, manh hung
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
cong van » cong vang, cong san, song van
van than » van thanh, van thang, van tuan
than cau » toan cau, phan cau, than cap

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

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