Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
cua triet » cua viet, su triet, va triet
vien cac » vien bach, vien dai, vien da
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va hanh, dia danh
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
cac lao » ca lao, cac loai, cac giao
va dan » ca dan, va dao, va dau

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) or (vu bach)) ky nang xa hoi. hieu vien cac lao ((va danh) OR (va dan)) vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu bach)) ky nang xa hoi. hieu vien cac lao ((va danh) OR (va dan)) vai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu bach)) ky nang xa hoi. hieu vien cac lao ((va danh) OR (va dan)) vai cua triet*".