Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
canh tinh » hanh tinh, manh tinh, nhanh tinh
chao yen » chao sen, chao yang, hai yen
yen tinh » tuyen tinh
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: chao yen tinh - ((canh tinh) or (canh tranh)) va nhung cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao yen tinh - ((canh tinh) OR (canh tranh)) va nhung cong van toan ban.
• Adding a wildcard symbol may retrieve word variants: chao yen tinh - ((canh tinh) or (canh tranh)) va nhung cong van toan ban*.