Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hoc sach » hoc sinh, hoc cac, hoc anh
van nang » van quang, van ban, van dong
soc van » hoc van, sac van, soc dan
te sach » toc sach
va tham » van tham, va cham, va thanh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
oc van » hoc van, luoc van, quoc van
vi ve » va ve, gi ve, ve ve

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

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