Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
cua triet » cua viet, su triet, va triet
vien dai » hien dai
vu sach » vu bach, su sach, vu khach
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
dai xuc » dai xu, dai luoc, dai thuc
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((ky lang) OR (ky tang)) xa hoi. hieu vien dai xuc va hanh vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ky lang) OR (ky tang)) xa hoi. hieu vien dai xuc va hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ky lang) OR (ky tang)) xa hoi. hieu vien dai xuc va hanh vi cua triet*.