Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
mai khoi » mai khoa, tai khoa, dai khoa
thanh ho » thanh pho, thanh hoa, thanh hoc
cac khoi » cac thoi, cac khoan, cach thoi
te sach » toc sach
ve cham » va cham, ve chat, vu cham
dua ban » dia ban, cua ban, qua ban
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
ho cua » hoc cua, hoi cua, hoa cua
ve cam » ve cac, va cam, ve cai

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