Perhaps you should try some spelling variations:
thanh tung » thanh cong
hien hanh » dieu hanh
tong cong » trong cong, cong cong, dung cong
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh
tung va » trung va, tuong va, dung va
va tong » va thong, va tuong, va trong

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 tung va tong cong ((dan toan) or (van toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - thanh tung va tong cong ((dan toan) OR (van toan)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - thanh tung va tong cong ((dan toan) or (van toan)) cao*.