Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
tan nhanh » tai nhanh, tan nhan, tan thanh
tu sach » thu sach, te sach, tu cach
hai cua » thai cua, dai cua, hoi cua
cao duc » dao duc, cao suc, giao duc
hieu va » lieu va
nang xa » nang x, lang xa, nang ma
lo nang » ho nang, ly nang, loai nang
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet

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) OR (su sach)) lo nang xa hoi. ((hieu va) OR (hieu qua)) cao duc tan nhanh hai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) lo nang xa hoi. ((hieu va) or (hieu qua)) cao duc tan nhanh hai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) lo nang xa hoi. ((hieu va) or (hieu qua)) cao duc tan nhanh hai cua tre*.