Perhaps you should try some spelling variations:
cham chua » kham chua, cha chua, chay chua
qua cham » qua hai, qua cac, va cham
chua ban » chua bang, cua ban, chua dan
sach ky » sach y, sach ty, sach kem
ban anh » ban hanh, ban banh, ban danh
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
anh de » hanh de, anh d, anh ve
de cua » le cua, te cua, dieu cua
x hoi » o hoi, x ho, 5 hoi

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