Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
chat soc » cham soc, chat hoc, chat doc
van hanh » van thanh, ban hanh, van ban
van lang » van nang, va lang, van hang
van anh » van thanh, tuan anh, van minh
su sach » so sach
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
vu sach » vu bach, vu khach
ve chat » va chat, van chat
vi su » va su, ve su, ki 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) OR (van anh)) vi 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) OR (van anh)) vi 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) OR (van anh)) vi su triet*.