Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
te sach » toc sach
dua ban » dia ban, cua ban, qua ban
va cham » va chat, va tham
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
va cai » va cac, va bai, va dai
ma hoi » mai hoi, xa hoi, ma hoa
di cuu » di cua, dinh cuu
di cau » da cau, diem cau

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 y nang ma hoi. hieu ((va cai) or (va cham)) dua ban thanh ((di cuu) OR (di cau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ma hoi. hieu ((va cai) OR (va cham)) dua ban thanh ((di cuu) OR (di cau)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ma hoi. hieu ((va cai) or (va cham)) dua ban thanh ((di cuu) OR (di cau)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. hieu ((va cai) or (va cham)) dua ban thanh ((di cuu) OR (di cau)) tre*.