Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc va
truc van » truc va, truc ban, truc dan
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
ve cac » va cac, vien cac
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
vi su » ve su, ki su, oi 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 sach v nang xa hoi. hieu ve cac ((truc van) OR (thuc van)) hang ((vi su) OR (va su)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang xa hoi. hieu ve cac ((truc van) OR (thuc van)) hang ((vi su) or (va su)) triet~".
• Adding a wildcard symbol may retrieve word variants: su sach v nang xa hoi. hieu ve cac ((truc van) OR (thuc van)) hang ((vi su) or (va su)) triet*.