Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
thanh tung » thanh cong
khong cang » thong cong, hong bang, khong dung
cua khong » hua khong, cua phuong, cua thuong
cang dan » cong dan, tang dan, canh dan
khan cap » than cap, khoan cam, phan cac
khan ap » han ap, khan dam

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 trung) OR (thanh tung)) cua khong cang dan ((khan cap) or (khan ap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - ((thanh trung) OR (thanh tung)) cua khong cang dan ((khan cap) OR (khan ap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien nhanh - ((thanh trung) OR (thanh tung)) cua khong cang dan ((khan cap) or (khan ap))".
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - ((thanh trung) OR (thanh tung)) cua khong cang dan ((khan cap) or (khan ap))*.