Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh van » thanh san, thanh toan, thanh phan
hanh van » khanh van, hanh va, hanh san
hieu van » hieu va, thien van, lieu va
kho tang » cao tang
tang xa » trang xa, tang ma, lang xa
nam xuc » cam xuc, nam xua, nam thuc
so sach » so sanh, bo sach, co sach
vu sach » vu bach, su sach, vu khach
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (so sach)) kho tang xa hoi. hieu van nam xuc va ((hanh van) OR (thanh van)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (so sach)) kho tang xa hoi. hieu van nam xuc va ((hanh van) OR (thanh van)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (so sach)) kho tang xa hoi. hieu van nam xuc va ((hanh van) OR (thanh van)) cua triet".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (so sach)) kho tang xa hoi. hieu van nam xuc va ((hanh van) OR (thanh van)) cua triet*.