Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
ky dang » ky danh
mai hoi » mai khoi, dai hoi, lai hoi
van cam » van nam, van lam, van dam
van cau » van dau, van hau, van chat
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky dang) OR (ky nang)) mai hoi. hieu ((van cam) OR (van cau)) truc va hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky dang) or (ky nang)) mai hoi. hieu ((van cam) OR (van cau)) truc va hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky dang) or (ky nang)) mai hoi. hieu ((van cam) OR (van cau)) truc va hanh vi cua tre*.