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
cau tren » cu tren, dau tren, ca tren
sach ky » sac ky, sach y, sach ty
xua ban » xuat ban, cua ban, qua ban
cua tre » cua te, cuu tre, cua triet
nam xua » nam cua, nam mua, nam qua
ma hoi » mai hoi, xa hoi, me 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 ((ma hoi) or (ma hoa)). hieu van nam xua ban thanh lai ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((ma hoi) OR (ma hoa)). hieu van nam xua ban thanh lai ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((ma hoi) or (ma hoa)). hieu van nam xua ban thanh lai ((cua tre) or (cau tren))*.