Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, hang cong
hien hanh » dieu hanh
trung cua » truong cua, trung tuan, trung cap
tong cong » trong cong, cong cong, dung cong
dan than » dan chan, ban than, van than
than man » than ma, thanh san, tran manh

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 - hanh trung cua ((nhung cong) or (tong cong)) dan than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - hanh trung cua ((nhung cong) OR (tong cong)) dan than man*.