Perhaps you should try some spelling variations:
sanh thu » sach thu, san thu, doanh thu
thu xang » thu hang, thu bang, thu dang
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
so sanh » do sanh
hac duc » hoc duc, ha duc, thach duc
van hac » van hoc, van ha, van hai
xang xa » lang xa, mang xa, ang xa
vi su » va su, ki su, oi su
ve su » va su

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

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