Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
truc van » truc va, thuc van, truc ban
ve triet » va trien, su triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
tuc van » thuc van, tuc va, duc van
anh van » anh va, thanh van, doanh van
van ve » van de, ban ve, van le

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 dang xa hoi. hieu vien cac ((tuc van) OR (truc van)) anh van ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky dang xa hoi. hieu vien cac ((tuc van) OR (truc van)) anh van ve triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky dang xa hoi. hieu vien cac ((tuc van) OR (truc van)) anh van ve triet*.