Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
te sach » toc sach
nam xuc » cam xuc, nam xua, nam thuc
cua tre » cua te, cuu tre, cua triet
va cua » va chua, via cua, ca cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((do sanh) or (te sach)) ky nang x hoi. hieu van nam xuc ((van hanh) OR (ban hanh)) va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((do sanh) OR (te sach)) ky nang x hoi. hieu van nam xuc ((van hanh) OR (ban hanh)) va cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((do sanh) or (te sach)) ky nang x hoi. hieu van nam xuc ((van hanh) OR (ban hanh)) va cua tre*".