Perhaps you should try some spelling variations:
van quan » van ban
ban hanh » ban hang
van tuan » van ban, anh tuan
xuc ban » duc ban, cuc ban, quoc ban
cac xuc » cam xuc, cac nuoc, chat xuc
su bach » vu bach, su sach, huu bach
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
vi su » va su, ki su, oi su
ve su » va su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su bach ((van quan) OR (van tuan)) xa hoi. hieu ve cac xuc ban hanh ((vi su) OR (ve su)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su bach ((van quan) or (van tuan)) xa hoi. hieu ve cac xuc ban hanh ((vi su) OR (ve su)) triet~".
• Adding a wildcard symbol may retrieve word variants: su bach ((van quan) or (van tuan)) xa hoi. hieu ve cac xuc ban hanh ((vi su) OR (ve su)) triet*.