Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
chu treo » cau treo, cu tren, cau tren
va thanh » gia thanh, va tinh, le thanh
hai chu » hai chau, hoi chu, hai chi
tu sach » thu sach, su sach, te sach
va chat » van chat, va phat, cao chat
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, vu cham
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang xa hoi. hieu ((ve cham) or (va chat)) duc ((va thanh) OR (ban thanh)) hai chu treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. hieu ((ve cham) OR (va chat)) duc ((va thanh) OR (ban thanh)) hai chu treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang xa hoi. hieu ((ve cham) or (va chat)) duc ((va thanh) OR (ban thanh)) hai chu treo".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. hieu ((ve cham) or (va chat)) duc ((va thanh) OR (ban thanh)) hai chu treo*.