Perhaps you should try some spelling variations:
sang tao » hang tai
tao khoi » tao hoi, thao khoa, lao khoa
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cho tre » cho thue, khoe tre
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
ky sang » ky nang, ky dang, ky tang
hieu ve » hieu van
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc 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 sang tao khoi. ((hieu ve) OR (hieu va)) cam xuc va hanh va ((cho tre) OR (cua tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky sang tao khoi. ((hieu ve) OR (hieu va)) cam xuc va hanh va ((cho tre) or (cua tre))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang tao khoi. ((hieu ve) OR (hieu va)) cam xuc va hanh va ((cho tre) or (cua tre))*.