Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
van khang » van khanh, van thanh, van quang
vien dai » hien dai
dai truc » dai thuc, doan truc, dai trung
truc van » truc va, thuc van, truc ban
khang da » khang a, khong day, chang dam
su triet » su viet, su tien, ve triet
su sach » so sach
vu sach » vu bach, vu khach
v nang » va nang, vu nang, van nang
da su » dan su, dat su, va su

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 sach)) v nang x ho. hieu vien dai truc van khang da su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) v nang x ho. hieu vien dai truc van khang da su triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) v nang x ho. hieu vien dai truc van khang da su triet*.