Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
toc sach » hoc sach, doc sach, thuoc sach
cham dua » chay dua, cham giua, pham duc
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
dua ban » dia ban, cua ban, qua ban
cua tre » cua te, cuu tre, cua triet

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

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