Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
ban thanh » ban hanh, ban hang
hang tai » hang va, dung tai
hieu van » hieu va, thien van, lieu va
lai cua » dai cua, hai cua, lai chau
dua ban » dia ban, cua ban, qua ban
cau dua » cau qua, cau cua, ca dua
van cau » van dau, van hau, van chat
sach ky » sach y, sach ty, sach kem
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) ((mang may) OR (hang tai)) hoa. hieu van cau dua ban thanh lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) ((mang may) or (hang tai)) hoa. hieu van cau dua ban thanh lai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) ((mang may) or (hang tai)) hoa. hieu van cau dua ban thanh lai cua tre*.