Perhaps you should try some spelling variations:
luong cong » dung cong, trong cong, cong cong
hanh tang » hanh trang, anh tang, hanh mang
duong dan » duong dang, huong dan, duong van
theo mau » tho mau, theo dau, theo chu
mau sach » mat sach, cau sach, hau sach
cong dan » cong san, cong tan, huong dan
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: theo mau sach - ((hanh tang) or (canh tranh)) luong cong ((cong dan) or (duong dan)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo mau sach - ((hanh tang) OR (canh tranh)) luong cong ((cong dan) OR (duong dan)) toan ban.
• Adding a wildcard symbol may retrieve word variants: theo mau sach - ((hanh tang) or (canh tranh)) luong cong ((cong dan) or (duong dan)) toan ban*.