Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
nam dua » nam da, nam cua, nam mua
dua ban » dia ban, cua ban, qua ban
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
me hoi » le hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang ((((xa hoi) or (me hoi))) or (ma hoa)). hieu van nam dua ban thanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((((xa hoi) OR (me hoi))) OR (ma hoa)). hieu van nam dua ban thanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((((xa hoi) or (me hoi))) or (ma hoa)). hieu van nam dua ban thanh lai cua tre*.