Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hoc sach » hoc sinh, hoc cac, hoc anh
thanh va » thanh van, hanh va, thanh ha
va cham » va chat, va tham
lang xa » dang xay, lang van
lang ha » long ha
dua ban » dia ban, cua ban, qua ban
va cua » va chua, via cua, ca cua
cua te » cua tu

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

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