Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
toc ban » toc san, hoc ban, coc ban
hanh di » hanh vi, hanh de, hang di
toc ba » toc ta, toc pa
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang x hoi. hieu vien cac ((toc ban) or (toc ba)) hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang x hoi. hieu vien cac ((toc ban) OR (toc ba)) hanh di cua triet.
• Adding a wildcard symbol may retrieve word variants: so sach ky nang x hoi. hieu vien cac ((toc ban) or (toc ba)) hanh di cua triet*.