Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
chieu xanh » chieu sach, chieu sang, chieu tinh
chau tinh » cuu tinh, ha tinh, cua tinh
tranh cua » doanh cua, manh cua
dung cong » dung trong
hang cong » dang cong, hang nong, bang cong
tran cau » tran chau, toan cau, ran cau

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 (chau tinh)) - hanh tranh cua ((dung cong) or (hang cong)) tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chau tinh)) - hanh tranh cua ((dung cong) OR (hang cong)) tan tran cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chau tinh)) - hanh tranh cua ((dung cong) or (hang cong)) tan tran cau*.