Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
ban hanh » ban hang
quoc ban » quoc bao, quoc lan, quoc quan
cac quoc » cac nuoc, cac cuoc, cao quoc
vien cac » vien bach, vien dai, vien da
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
vai cua » dai cua, lai cua, bai cua
hai cua » thai cua, dai cua, hoi cua
te sach » toc sach

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) or (vu bach)) ky lang xa hoi. hieu vien cac quoc ban hanh ((vai cua) or (hai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (vu bach)) ky lang xa hoi. hieu vien cac quoc ban hanh ((vai cua) OR (hai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (vu bach)) ky lang xa hoi. hieu vien cac quoc ban hanh ((vai cua) or (hai cua)) triet*.