Perhaps you should try some spelling variations:
mai khoi » mai khoa, cac khoi, dai khoa
danh tai » doanh tai, dinh tai, hanh tai
tai khoa » da khoa, noi khoa
te sach » toc sach
tai cuu » tai cuc, tai buu, tai cua
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
ve cac » va cac, vien cac
va cao » va cac, va co, va dao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang ((mai khoi) OR (tai khoa)). hieu ((va cao) OR (ve cac)) thuc va danh tai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang ((mai khoi) OR (tai khoa)). hieu ((va cao) or (ve cac)) thuc va danh tai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang ((mai khoi) OR (tai khoa)). hieu ((va cao) or (ve cac)) thuc va danh tai cuu tre*.