Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
hanh ma » hanh mau, hanh may, hanh va
van am » van nam, van lam, van dam
x hoi » xa hoi, o hoi, x ho
ma va » ma van, mua va, me va

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: tu sach ky nang x hoi. hieu ((van am) OR (phan tu)) thuc va hanh ma va triet~.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ((van am) or (phan tu)) thuc va hanh ma va triet*.