Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cau tren » cu tren, dau tren, ca tren
qua cham » qua hai, qua cac, va cham
cham xuc » cam xuc, chat xuc, cham soc
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky tang ma hoi. hieu qua cham xuc ((va hanh) or (ban thanh)) dinh ((cau tren) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky tang ma hoi. hieu qua cham xuc ((va hanh) OR (ban thanh)) dinh ((cau tren) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: su sach ky tang ma hoi. hieu qua cham xuc ((va hanh) or (ban thanh)) dinh ((cau tren) or (cua tre))*.