Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
ban thanh » ban hanh, ban hang
thanh cao » thanh ca, thanh cac, thanh thao
cua dung » cua dong, qua dung, cua rung
cua dang » cua cong, cua ban
cong ban » cong bang, cong san, cong tan

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 sang) or (hieu lang)) - hanh tranh ((cua dung) or (cua dang)) cong ban thanh cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - hanh tranh ((cua dung) OR (cua dang)) cong ban thanh cao.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - hanh tranh ((cua dung) or (cua dang)) cong ban thanh cao*.