Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
tranh luan » trinh luan, trinh luat, doanh luan
luan nang » luan van, van nang, luan san
nang nong » nang song, hang nong, nang dong
nong tan » cong tan, nong dan, nong san
tran cao » toan cao, tran chau, trang cho

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu xanh) or (chieu sang)) - canh tranh luan nang nong tan tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sang)) - canh tranh luan nang nong tan tran cao.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sang)) - canh tranh luan nang nong tan tran cao*.