Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
qua cham » qua hai, qua cac, va cham
cham dua » chay dua, cham giua, pham duc
tu sach » su sach, te sach, tu cach
dua ban » dia ban, cua ban, qua ban
ban anh » ban hanh, ban banh, ban danh
cua tre » cua te, cuu tre, cua triet
x hoi » o hoi, x ho, 5 hoi
d cua » de cua, do cua, da cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (thu sach)) ky nang ((x hoi) or (xa hoi)). hieu qua cham dua ban anh d cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang ((x hoi) OR (xa hoi)). hieu qua cham dua ban anh d cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky nang ((x hoi) or (xa hoi)). hieu qua cham dua ban anh d cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky nang ((x hoi) or (xa hoi)). hieu qua cham dua ban anh d cua tre*.