Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
hieu van » hieu va, thien van, lieu va
nang ma » tang ma, sang ma, nang cao
van lam » van nam
dua ban » dia ban, cua ban, mua ban
qua ban » cua ban, qua quan
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
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 nang ma hoa. hieu van lam ((dua ban) or (qua ban)) thanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ma hoa. hieu van lam ((dua ban) OR (qua ban)) thanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ma hoa. hieu van lam ((dua ban) or (qua ban)) thanh lai cua tre*.