Perhaps you should try some spelling variations:
ban hanh » ban hang
nang han » nang phan, nang hang, nang hanh
xuc ban » duc ban, cuc ban, quoc ban
van cam » van lam, van cau, van dam
cua tre » cua te, cuu tre, cua triet
han hoi » phan hoi, dan hoi, van hoi
sach tu » sach thu, cach tu, sach ty
sac ky » cac ky, sai ky
vi cua » vai cua, di cua

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

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