Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh cac » hanh cac, thanh bac, thanh ca
chua tre » chua tri, chua trieu, cho tre
te sach » toc sach
vu cham » va cham, vu kham, tu cham
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, ve chim
tang ha » lang ha, tang ma, trung ha
ky tang » ky nang, ky dang, kho tang
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky tang ha hoi. hieu ((ve cham) or (vu cham)) duc ban thanh cac ((chua tre) OR (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky tang ha hoi. hieu ((ve cham) OR (vu cham)) duc ban thanh cac ((chua tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky tang ha hoi. hieu ((ve cham) or (vu cham)) duc ban thanh cac ((chua tre) OR (cua tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ky tang ha hoi. hieu ((ve cham) or (vu cham)) duc ban thanh cac ((chua tre) OR (cua tre))*.