Perhaps you should try some spelling variations:
dang xay » dang van, van xay
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ban anh » ban hanh, ban banh, ban danh
cuc ban » cua ban, cac ban, cuu ban
cam cuc » cam xuc, cham cuu, pham cuc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, lang van
tang ma » mang may, tang van
va cam » va cham, va cac, va cao
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua

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 (dang xay))) or (tang ma)) hoi. hieu va cam cuc ban anh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((((lang xa) OR (dang xay))) OR (tang ma)) hoi. hieu va cam cuc ban anh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((((lang xa) OR (dang xay))) or (tang ma)) hoi. hieu va cam cuc ban anh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((((lang xa) OR (dang xay))) or (tang ma)) hoi. hieu va cam cuc ban anh vi cua tre*.