Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
hanh tang » anh tang, hanh mang, hanh tung
luan dung » lan dung, luan dong, luan hung
dung cong » dung trong
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran ban » tranh ban, tran van, toan ban

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 sach)) - ((hanh tang) or (hanh trang)) luan dung cong tac tran ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - ((hanh tang) OR (hanh trang)) luan dung cong tac tran ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) OR (chieu sach)) - ((hanh tang) or (hanh trang)) luan dung cong tac tran ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) OR (chieu sach)) - ((hanh tang) or (hanh trang)) luan dung cong tac tran ban*.