Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien nhanh » hien hanh, thien thanh, tien thanh
trung toan » truong toan, trung tuan, trung tran
thong cang » thong cong, khong cang, thong cung
khoan cam » khoa cam, khoan va, phan cam
cang dan » cong dan, tang dan, canh dan
khan cap » khan ap, than cap, phan cac

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 toan thong cang dan ((khan cap) or (khoan cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - thanh trung toan thong cang dan ((khan cap) OR (khoan cam)).
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - thanh trung toan thong cang dan ((khan cap) or (khoan cam))*.