Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
hanh trung » thanh trung, hanh trang, manh trung
thong cong » trong cong, tong cong, thong thong
hien hanh » dieu hanh
trung cua » truong cua, trung tuan, trung cap
hang cong » dang cong, hang nong, bang cong
dan than » dan chan, ban than, van than
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 (hien hanh)) - hanh trung cua ((hang cong) or (thong cong)) dan than ma~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (hien hanh)) - hanh trung cua ((hang cong) OR (thong cong)) dan than ma.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (hien hanh)) - hanh trung cua ((hang cong) or (thong cong)) dan than ma*.