Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
sang tao » hang tai
lap cua » lai cua, lam cua, ap cua
ky sang » ky nang, ky dang, ky tang
tao hoi » tao khoi, tao boi, tay hoi
hieu ve » hieu va, hieu van
tap cua » tap quan, tiep cua
sach ky » sac ky, sach y, sach ty
duc ban » duc tan, duc van, dua ban

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: toc sach ky sang tao hoi. ((hieu ve) OR (hieu qua)) pham duc ban thanh ((lap cua) OR (tap cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky sang tao hoi. ((hieu ve) or (hieu qua)) pham duc ban thanh ((lap cua) OR (tap cua)) te~".
• Adding a wildcard symbol may retrieve word variants: toc sach ky sang tao hoi. ((hieu ve) or (hieu qua)) pham duc ban thanh ((lap cua) OR (tap cua)) te*.