Perhaps you should try some spelling variations:
ngang thanh » nang thanh, nganh thanh, ngan thanh
chieu xanh » chieu sach, chieu sang, chieu tinh
cong ngang » cong nhan, cong quang, cong lang
thanh cac » hanh cac, thanh bac, thanh ca
ho chieu » theo chieu, hoc thieu, doi chieu
cua dung » cua dang, qua dung, cua rung
cua dong » chua dong, cua cong, cua dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu xanh - canh tranh ((cua dung) or (cua dong)) cong ngang thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - canh tranh ((cua dung) OR (cua dong)) cong ngang thanh cac.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - canh tranh ((cua dung) or (cua dong)) cong ngang thanh cac*.