Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
nang xa » nang x, lang xa, nang ma
van hac » van hoc, van ha, van hai
hac xuc » chat xuc
xuc ban » duc ban, cuc ban, quoc ban
lam cua » nam cua, lam chat
sach v » sach va, sach 2, sach vay

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach v) OR (sach y)) nang xa hoi. hieu van hac xuc ban thanh ((lam cua) or (cao chat)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach v) OR (sach y)) nang xa hoi. hieu van hac xuc ban thanh ((lam cua) OR (cao chat)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach v) OR (sach y)) nang xa hoi. hieu van hac xuc ban thanh ((lam cua) or (cao chat)) triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach v) OR (sach y)) nang xa hoi. hieu van hac xuc ban thanh ((lam cua) or (cao chat)) triet*.