Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
thong cong » trong cong, tong cong, thong thong
cua thong » cua thuong, cua khong, cua tong
cong tan » cong tac, cong san, cong thanh
chan dau » phan dau, han dau, chuan dao
doanh » danh, toanh, soanh
doan » dan, toan, soan

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 - canh (doanh or soanh) cua thong cong tan ((chan dau) or (chan doan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - canh (doanh OR soanh) cua thong cong tan ((chan dau) OR (chan doan)).
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - canh (doanh or soanh) cua thong cong tan ((chan dau) or (chan doan))*.