Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh dai » thanh hai, thanh tai, thanh dat
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
ve chim » va chim, ve cham, ve chinh
va cham » va chat, va tham
tuc ban » thuc ban, truc ban, tu ban
dai va » mai va

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 dang xa hoi. hieu ((ve chim) or (va cham)) tuc ban thanh dai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu ((ve chim) OR (va cham)) tuc ban thanh dai va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu ((ve chim) or (va cham)) tuc ban thanh dai va triet*.