Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
van lang » van nang, va lang, van hang
chat soc » cham soc, chat hoc, chat doc
ve chat » va chat, van chat
soc van » hoc van, oc van, sac van
su sach » so sach
lang xa » lang ha, dang xay, lang van
vu sach » vu bach, vu khach
hieu ve » hieu va, hieu van
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) OR (vu sach)) van lang xa hoi. hieu ve chat soc van hanh ((vi su) OR (va su)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) van lang xa hoi. hieu ve chat soc van hanh ((vi su) OR (va su)) triet~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) van lang xa hoi. hieu ve chat soc van hanh ((vi su) OR (va su)) triet*.