Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nhan luc » nang luc
dang hai » dang khai, hang hai, dung hai
van dang » van dong, van dung, van nang
cua tre » cua te, cuu tre, dua tren
luc van » luoc van, luu van, duc van
te sach » toc sach
hieu ve » hieu va, hieu van
ve nhan » ve nha, de nhan, va nhan
y nang » ky nang, ly nang, may nang
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 ((y nang) OR (v nang)) xa hoi. hieu ve nhan luc van dang hai ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) or (v nang)) xa hoi. hieu ve nhan luc van dang hai ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (v nang)) xa hoi. hieu ve nhan luc van dang hai ((cua tre) OR (cua triet))*.