Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van ban
qua cam » qua cham, qua cac, qua ca
dan cua » dan ca, ban cua, dai cua
van anh » van thanh, tuan anh, van minh
cua tre » cua te, cuu tre, cua triet
tay hoi » tay ho, tao hoi, tay thai
dan tay » ban tay, dao tay, gian tay
sach tu » sach thu, cach tu, sach ty
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) or (sach tu)) dan tay hoi. hieu qua cam xuc ((van hanh) or (van anh)) dan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sach tu)) dan tay hoi. hieu qua cam xuc ((van hanh) OR (van anh)) dan cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sach tu)) dan tay hoi. hieu qua cam xuc ((van hanh) or (van anh)) dan cua tre*.