Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cac khoi » cac thoi, cac khoan, cach thoi
mai khoi » tai khoa, dai khoa, khi khoi
thanh ho » thanh pho, thanh hoa, thanh hoc
mai khoa » tai khoa, may khoa, dai khoa
dua ban » dia ban, cua ban, qua ban
cam dua » ca dua, cay dua, chay dua
hieu ve » hieu va, hieu van
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam
ho cuu » ho chu, ho cua, so cuu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ((((mai khoi) OR (mai khoa))) or (cac khoi)). hieu ve cam dua ban thanh ho cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((((mai khoi) OR (mai khoa))) OR (cac khoi)). hieu ve cam dua ban thanh ho cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((((mai khoi) OR (mai khoa))) or (cac khoi)). hieu ve cam dua ban thanh ho cuu tre*".