Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dang hai » dang khai, hang hai, dung hai
van dang » van dong, van dung, van nang
nhan luc » nang luc
te sach » toc sach
hai cua » thai cua, dai cua, hoi cua
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va
ly nang » ky nang, ly hang, ly vang
v nang » va nang, vu nang, van nang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ly nang) OR (v nang)) xa hoi. ((hieu ve) OR (hieu van)) nhan luc van dang hai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ly nang) or (v nang)) xa hoi. ((hieu ve) OR (hieu van)) nhan luc van dang hai cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ((ly nang) or (v nang)) xa hoi. ((hieu ve) OR (hieu van)) nhan luc van dang hai cua tre*.