Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va thanh » gia thanh, va tinh, le thanh
cham hoc » cham soc, chat hoc, cham hoi
va cham » va chat, va tham
dai cuu » dai cua, dai huu
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
lang ha » long ha
lang xa » dang xay, lang van
cuu tre » cua tre, cau tren, cau treo

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) or (lang ha)) hoi. lieu va cham hoc ((va thanh) OR (ban thanh)) dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((lang xa) OR (lang ha)) hoi. lieu va cham hoc ((va thanh) OR (ban thanh)) dai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((lang xa) or (lang ha)) hoi. lieu va cham hoc ((va thanh) OR (ban thanh)) dai cuu tre*".