Perhaps you should try some spelling variations:
chau phuc » chau phu, cau phuc, khac phuc
hieu van » thien van, lieu va
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 va » lieu va, hieu qua
phuc va » phuc vu, thuc va, chuc 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 nang cao hoi. ((((hieu ve) OR (hieu van))) OR (hieu va)) chau phuc va hanh vi 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 van))) or (hieu va)) chau phuc va hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang cao hoi. ((((hieu ve) OR (hieu van))) or (hieu va)) chau phuc va hanh vi cua tre*.