Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu cua » hieu qua, dieu cua, bieu cua
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cac vuc » cac vung, cac cuoc, cac quoc
van anh » van thanh, tuan anh, van minh
y nang » ky nang, ly nang, v nang
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu cua ((cac vuc) OR (cac nuoc)) van anh vi cua triet~.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu cua ((cac vuc) or (cac nuoc)) van anh vi cua triet*.