Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
cao hoc » co hoc, cho hoc, chat hoc
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
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 cao hoc. hieu van nam ((luc va) or (duc van)) anh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang cao hoc. hieu van nam ((luc va) OR (duc van)) anh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach y nang cao hoc. hieu van nam ((luc va) or (duc van)) anh vi cua tre*.