Perhaps you should try some spelling variations:
duc manh » suc manh, duc anh, duc minh
hang tai » hang va, dung tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu van
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
tai cua » thai cua, tai cuc, tri cua
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 ky nang cao hoi. ((hieu ve) OR (hieu va)) cac ((xuc van) OR (duc manh)) hang tai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang cao hoi. ((hieu ve) OR (hieu va)) cac ((xuc van) or (duc manh)) hang tai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang cao hoi. ((hieu ve) OR (hieu va)) cac ((xuc van) or (duc manh)) hang tai cua tre*.