Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, tu cach
dinh va » dinh van, dinh ve, tinh va
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
te sach » toc sach
de cho » de co, de che, ke cho
va cua » va chua, via cua, ca cua
ve cho » ve co, ve che, ke cho
su va » su van, tu va

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