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
hieu va » lieu va, hieu qua
van anh » van thanh, tuan anh
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
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 ((nang cao) or (dang xay)) hoi. hieu va cam xuc ((van anh) OR (van minh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang cao) OR (dang xay)) hoi. hieu va cam xuc ((van anh) OR (van minh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang cao) or (dang xay)) hoi. hieu va cam xuc ((van anh) OR (van minh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang cao) or (dang xay)) hoi. hieu va cam xuc ((van anh) OR (van minh)) vi cua tre*.