Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
pham thuc » phap thuc, pham chuc, nham thuc
sach thu » sach thue, sach thieu, sach tham
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, xach tay
dai hoi » dai hai, dai moi
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ty) OR (sach thu)) nang ((dai hoi) or (dai hoc)). hieu ve pham thuc va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach thu)) nang ((dai hoi) OR (dai hoc)). hieu ve pham thuc va hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach thu)) nang ((dai hoi) or (dai hoc)). hieu ve pham thuc va hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach thu)) nang ((dai hoi) or (dai hoc)). hieu ve pham thuc va hanh vi cua triet*.