Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc chieu » hoc thieu, ho chieu, hoc hien
tranh cua » doanh cua, manh cua
bang song » nang song
dang cong » dung cong
toan cau » toan cao, toan tap, toan tai
toan ban » van 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 - hanh tranh cua ((bang song) or (dang cong)) dan ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh tranh cua ((bang song) OR (dang cong)) dan ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh tranh cua ((bang song) or (dang cong)) dan ((toan cau) or (toan ban))*.