Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang ma, mang xa, ang xa
lang xa » lang ha, dang xay, lang van
cua van » cua ban, cua vat, cua dan
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((((nang xa) OR (lang xa))) OR (nang x)) hoi. hieu van nam cua van hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((((nang xa) OR (lang xa))) or (nang x)) hoi. hieu van nam cua van hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((((nang xa) OR (lang xa))) or (nang x)) hoi. hieu van nam cua van hanh vi cua tre*.