Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
sach thu » sach thue, sach thieu, sach tham
hanh lam » thanh lap, hanh kem, hanh va
luoc van » luoc can, luoc va, luot van
hieu cao » chieu cao, hieu cac, hieu ca
luc van » luu van, duc van, luc va
xang xa » lang xa, mang xa, dang xay
so sach » so sanh, bo sach, co sach
ang xa » lang xa, mang xa, dang xay
lam va » nam va, dam va, lam ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thu ((xang xa) or (ang xa)) hoi. hieu cao chat ((luc van) OR (luoc van)) hanh lam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu ((xang xa) OR (ang xa)) hoi. hieu cao chat ((luc van) OR (luoc van)) hanh lam va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thu ((xang xa) or (ang xa)) hoi. hieu cao chat ((luc van) OR (luoc van)) hanh lam va triet".
• Adding a wildcard symbol may retrieve word variants: so sach thu ((xang xa) or (ang xa)) hoi. hieu cao chat ((luc van) OR (luoc van)) hanh lam va triet*.