Perhaps you should try some spelling variations:
ban hanh » ban hang
hanh doi » thanh doi, hanh noi, hang doi
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach
qua cam » qua cham, qua cac, qua ca
cam tuc » cam xuc, cam tu, nam thuc
tuc ban » thuc ban, truc ban, tu ban
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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: ((so sach) or (bo sach)) y nang x hoi. hieu qua cam tuc ban hanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) y nang x hoi. hieu qua cam tuc ban hanh doi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (bo sach)) y nang x hoi. hieu qua cam tuc ban hanh doi cua tre*.