Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hoai ve » hoi ve, hoai va, loai ve
su sach » so sach, vu sach
hoc tuc » hoc thuc, hoc truc, hoc tu
van hoc » van hoa
nang xa » nang x, lang xa, nang ma
tuc va » thuc va, truc va, tuc xa
y nang » ky nang, ly nang, v nang
hai ve » hai va, hoi ve, dai ve
hai vu » hai va
va dan » ca dan, va dao, va dau

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 y nang xa hoi. hieu van hoc tuc va dan ((((hai ve) OR (hoai ve))) or (hai vu)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu van hoc tuc va dan ((((hai ve) OR (hoai ve))) OR (hai vu)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu van hoc tuc va dan ((((hai ve) OR (hoai ve))) or (hai vu)) triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu van hoc tuc va dan ((((hai ve) OR (hoai ve))) or (hai vu)) triet*.