Perhaps you should try some spelling variations:
dien sach » dien anh
vien dai » hien dai
dien cac » vien cac, dien cuc, dien va
danh sai » dung sai, danh bat, danh dau
tu sach » thu sach, su sach, te sach
sai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach ty
lo va » lo van, lao va, ly va

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 hoi. hieu ((((dien cac) OR (dien sach))) OR (vien dai)) lo va danh sai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu ((((dien cac) OR (dien sach))) or (vien dai)) lo va danh sai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ((((dien cac) OR (dien sach))) or (vien dai)) lo va danh sai cua tre*.