Perhaps you should try some spelling variations:
canh trinh » hanh trinh, canh tinh, anh trinh
chieu xanh » chieu sach, chieu sang, chieu tinh
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
va thong » va thuong, va phuong, he thong
cong van » cong vang, cong san, song van
van chat » cao chat

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

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