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
sach ty » sach y, sach tu, xach tay
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((sach ty) or (sach thu)) nang x hoi. hieu va pham thuc va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((sach ty) OR (sach thu)) nang x hoi. hieu va pham thuc va hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: doc ((sach ty) or (sach thu)) nang x hoi. hieu va pham thuc va hanh vi cua triet*.