Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh hai » thanh phan, thanh hoa, thanh san
ky mang » ky nang, ky dang, ky tang
ke mang » ke nang, ke trang
may hoi » may thoi, tay hoi, mai hoi
hieu ve » hieu va, hieu van
dua ban » dia ban, cua ban, qua ban
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
su xac » pu xac, su cac
ca dua » cay dua, ca cua, ca da
ve ca » ve cac, ve cai, ve cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ((ky mang) OR (ke mang)) may hoi. hieu ve ca dua ban thanh hai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ((ky mang) OR (ke mang)) may hoi. hieu ve ca dua ban thanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: su xac ((ky mang) OR (ke mang)) may hoi. hieu ve ca dua ban thanh hai cua tre*.