Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
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
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang cao hoi. ((hieu ve) OR (hieu va)) cam xuc van hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang cao hoi. ((hieu ve) OR (hieu va)) cam xuc van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang cao hoi. ((hieu ve) OR (hieu va)) cam xuc van hanh vi cua tre*.