Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
hanh tranh » hanh trinh, hanh trang, lanh tranh
cac phuong » cac truong
hieu lang » chieu sang, hieu quang, nhieu tang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - ((hanh tranh) or (canh tranh)) cac phuong cong dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((hanh tranh) OR (canh tranh)) cac phuong cong dan toan ban.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((hanh tranh) or (canh tranh)) cac phuong cong dan toan ban*.