Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, nhung don
hien hanh » dieu hanh
trung cua » truong cua, trung tuan, trung cap
hang cong » dang cong, hang nong, bang cong
tan nhan » tran nhan, tao nhan, van nhan
nhan tu » nhanh tu, phan tu, nhan su

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