Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
ve cao » va cao, ve bao, ve co
ve cac » va cac, vien cac
vi cuu » vi luu, vinh cuu
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu ((ve cao) OR (ve cac)) duc va hanh vi cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ((ve cao) OR (ve cac)) duc va hanh vi cuu tre*.