Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
van quang » van quan, tran quang, van tuan
vien sau » vien dai, vien da, nien su
sau truc » cau truc, sach truc, tu truc
su triet » su viet, ve triet
quang di » quang dai, quang d, quang de
truc van » truc va, thuc van, truc ban
su sach » vu sach
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
su tien » su kien, su hien, tu tieng
v nang » va nang, vu nang, van nang

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 (so sach)) v nang xa hoi. hieu vien sau truc van quang di ((su triet) OR (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) v nang xa hoi. hieu vien sau truc van quang di ((su triet) OR (su tien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) v nang xa hoi. hieu vien sau truc van quang di ((su triet) OR (su tien))".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) v nang xa hoi. hieu vien sau truc van quang di ((su triet) OR (su tien))*.