Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
theo chieu » theo tieu, ho chieu, thi chieu
thong cong » trong cong, tong cong, thong thong
theo chu » cho chu, chao chu, theo yeu
trinh va » trinh van, trinh vat, trinh ve
va thong » va thuong, va phuong, he thong
san nhan » van nhan, sat nhan, san nhat
ban nhan » ban than, van nhan, ban thanh

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) OR (theo chu)) xanh - canh trinh va thong cong ((san nhan) or (ban nhan)) su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) xanh - canh trinh va thong cong ((san nhan) OR (ban nhan)) su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo chu)) xanh - canh trinh va thong cong ((san nhan) or (ban nhan)) su".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo chu)) xanh - canh trinh va thong cong ((san nhan) or (ban nhan)) su*.