Perhaps you should try some spelling variations:
dang xay » dang van, van xay
va thanh » ban thanh, va tinh, le thanh
cham xuc » cam xuc, chat xuc, cham soc
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
hieu va » lieu va, hieu qua
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.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((dang xay) or (nang x)) hoi. hieu va cham xuc ((va thanh) OR (gia thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((dang xay) OR (nang x)) hoi. hieu va cham xuc ((va thanh) OR (gia thanh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((dang xay) or (nang x)) hoi. hieu va cham xuc ((va thanh) OR (gia thanh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((dang xay) or (nang x)) hoi. hieu va cham xuc ((va thanh) OR (gia thanh)) vi cua tre*.