Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
hanh trung » thanh trung, hanh trang, manh trung
theo bien » thieu bien, theo tieu, che bien
bien tinh » bi tinh, yen tinh, diep tinh
trung cua » truong cua, trung tuan, trung cap
cong san » cong tac
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 bien tinh - hanh trung cua cong ((cong thanh) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo bien tinh - hanh trung cua cong ((cong thanh) OR (cong san)) toan ban.
• Adding a wildcard symbol may retrieve word variants: theo bien tinh - hanh trung cua cong ((cong thanh) or (cong san)) toan ban*.