Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong khanh » cong thanh, cong khan, cong nhan
hien hanh » dieu hanh
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong hach » cong sach, cong thanh, trong hach
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: hoc hien hanh - thanh trung cua nhung ((cong hach) or (cong khanh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - thanh trung cua nhung ((cong hach) OR (cong khanh)) toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - thanh trung cua nhung ((cong hach) or (cong khanh)) toan ban*.