Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thanh em » thanh liem, thanh nam, thanh tam
va thanh » gia thanh, ban thanh, va tinh
huu dung » huu tung, huu quang, thuy dung
te sach » toc sach
huu duc » cuu duoc
ly hang » ly quang
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
em cua » diem 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) or (ly hang)) xa hoi. hieu van ((huu duc) OR (huu dung)) va thanh em cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ly hang)) xa hoi. hieu van ((huu duc) OR (huu dung)) va thanh em cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) or (ly hang)) xa hoi. hieu van ((huu duc) OR (huu dung)) va thanh em cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (ly hang)) xa hoi. hieu van ((huu duc) OR (huu dung)) va thanh em cua tre*.