Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
thong cong » trong cong, tong cong, thong thong
hanh tang » hanh trang, anh tang, hanh mang
va thong » va thuong, va phuong, he thong
cong san » cong tac
san van » tan van, luan van, tran van

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 - ((hanh tang) or (canh tranh)) va thong cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - ((hanh tang) OR (canh tranh)) va thong cong san van ban.
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - ((hanh tang) or (canh tranh)) va thong cong san van ban*.