Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
va doanh » vay doanh, va danh, hoa doanh
te sach » toc sach
lai cua » dai cua, hai cua, lai chau
cam duc » cam xuc, cao duc, pham duc
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
ma hoi » mai hoi, xa hoi, ma hoa
va dao » ca 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 sang ma hoi. hieu ve cam duc ((((va doanh) OR (van doanh))) OR (va dao)) lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky sang ma hoi. hieu ve cam duc ((((va doanh) OR (van doanh))) or (va dao)) lai cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky sang ma hoi. hieu ve cam duc ((((va doanh) OR (van doanh))) or (va dao)) lai cua tre*.