Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
thanh tung » thanh cong
thong cong » trong cong, thong thong, phong chong
tong cong » trong cong, cong cong, dung cong
tung tam » trung tam, vung tam, dung tam
phan cau » phan dau, phan cac, phan tu
khan cap » khan ap, than cap, khoan cam

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 - thanh tung tam ((thong cong) or (tong cong)) dan ((phan cau) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - thanh tung tam ((thong cong) OR (tong cong)) dan ((phan cau) OR (khan cap)).
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - thanh tung tam ((thong cong) or (tong cong)) dan ((phan cau) or (khan cap))*.