Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hanh trung » thanh trung, hanh trang, manh trung
thong cong » trong cong, tong cong, thong thong
trung cua » truong cua, trung tuan, trung cap
hang cong » dang cong, hang nong, bang cong
van than » van thanh, van thang, van tuan
than ma » than man, than va, khan ma

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 nhanh) or (dieu hanh)) - hanh trung cua ((hang cong) or (thong cong)) van than ma~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (dieu hanh)) - hanh trung cua ((hang cong) OR (thong cong)) van than ma.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (dieu hanh)) - hanh trung cua ((hang cong) or (thong cong)) van than ma*.