Perhaps you should try some spelling variations:
hai chua » hai cua, hai chu, kham chua
chua dan » cua dan, chua dac, chua dau
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
qua hai » qua hoat
dan anh » dan canh, dan hanh, van anh
cua tre » cua te, cuu tre, cua triet
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 nang ((x hoi) or (xa hoi)). hieu qua hai chua dan anh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((x hoi) OR (xa hoi)). hieu qua hai chua dan anh de cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((x hoi) or (xa hoi)). hieu qua hai chua dan anh de cua tre*.