Perhaps you should try some spelling variations:
hieu van » thien van, lieu va
duc manh » suc manh, duc anh, duc minh
manh anh » minh anh, anh anh, thanh anh
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
anh vi » hanh vi, anh va, anh ve
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: te sach y nang xa hoi. ((((hieu ve) or (hieu van))) or (hieu va)) giao duc manh anh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. ((((hieu ve) OR (hieu van))) OR (hieu va)) giao duc manh anh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. ((((hieu ve) or (hieu van))) or (hieu va)) giao duc manh anh vi cua tre*.