Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
su triet » su tien, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cac toi » cac thoi
toi san » tai san, toc san, thi san
san anh » van anh, lan anh, sat anh
su viet » so viet
anh va » hanh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang xa hoi. hieu vien cac toi san anh va ((su triet) OR (su viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu vien cac toi san anh va ((su triet) OR (su viet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu vien cac toi san anh va ((su triet) OR (su viet))*.