Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
ban thanh » ban hanh, ban hang
su sach » so sach, vu sach
lai cua » dai cua, hai cua, lai chau
dua ban » dia ban, cua ban, qua ban
van cay » van cau, van ca, van chat
van bay » van ban, van bao, van bac
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
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: su sach ky nang ((mai hoi) or (ma hoa)). hieu ((van cay) OR (van bay)) dua ban thanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((mai hoi) OR (ma hoa)). hieu ((van cay) OR (van bay)) dua ban thanh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((mai hoi) or (ma hoa)). hieu ((van cay) OR (van bay)) dua ban thanh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((mai hoi) or (ma hoa)). hieu ((van cay) OR (van bay)) dua ban thanh lai cua tre*.