Perhaps you should try some spelling variations:
van hoang » van hoan, quan hoang, tran hoang
thu van » thuc van, thuy van, tu van
dien va » dien hoa
dieu va » dieu van, lieu va, hieu va
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
ve cac » va cac, vien cac
y nang » ky nang, ly nang, v nang
ve cam » ve cham, va cam, ve cai

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: so sach y nang xa hoi. hieu ((ve cam) OR (ve cac)) thu van hoang ((dieu va) OR (dien va)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang xa hoi. hieu ((ve cam) or (ve cac)) thu van hoang ((dieu va) OR (dien va)) triet~".
• Adding a wildcard symbol may retrieve word variants: so sach y nang xa hoi. hieu ((ve cam) or (ve cac)) thu van hoang ((dieu va) OR (dien va)) triet*.