Perhaps you should try some spelling variations:
chau phu » chau phi, chau au, chau tho
tu sach » thu sach, su sach, te sach
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu van
hieu va » lieu va, hieu qua
vu hanh » vu khanh, vu thanh, du hanh
cua tre » cua te, cuu tre, cua triet
y nang » ly nang, v nang, may nang
phu vu » phuc vu, phu nu, khu vu
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 ((y nang) OR (ky nang)) cao hoi. ((hieu ve) OR (hieu va)) chau phu vu hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) OR (ky nang)) cao hoi. ((hieu ve) or (hieu va)) chau phu vu hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) OR (ky nang)) cao hoi. ((hieu ve) or (hieu va)) chau phu vu hanh vi cua tre*.