Perhaps you should try some spelling variations:
qua cham » qua cac, va cham, qua cua
tu sach » thu sach, su sach, tu cach
ban anh » ban hanh, ban banh, ban danh
duc ban » duc tan, duc van, dua ban
qua hai » qua hoat
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
anh da » anh dat, anh d, anh va
da cua » dai cua, day cua, dan cua
x hoi » xa hoi, o hoi, x ho

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