Perhaps you should try some spelling variations:
van nang » van quang, van ban, van dong
su triet » su viet, su tien, ve triet
su sach » so sach
vu sach » vu bach, vu khach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
soc van » hoc van, oc van, soc dan
sac van » cac van, san van, sat van
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu sach)) van nang xa hoi. hieu ve cham ((soc van) OR (sac van)) hanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) van nang xa hoi. hieu ve cham ((soc van) OR (sac van)) hanh vi su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) van nang xa hoi. hieu ve cham ((soc van) OR (sac van)) hanh vi su triet*".