Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » thuat sach, thuoc sach, thu hoach
hieu van » hieu va, thien van, lieu va
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
hai xuc » hai cuc, hai xu, chat xuc
van hai » van ha, van chat, van hanh
tu sach » su sach, te sach, tu cach
vu nang » vuc nang, va nang, vu dang
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de cua
5 hoi » o hoi

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) OR (thu sach)) vu nang ((5 hoi) or (xa hoi)). hieu van hai xuc va hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) vu nang ((5 hoi) OR (xa hoi)). hieu van hai xuc va hanh di cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) vu nang ((5 hoi) or (xa hoi)). hieu van hai xuc va hanh di cua triet*".