Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cam thuc » am thuc, nam thuc, cam thu
tu sach » thu sach, su sach, te sach
co sach » bo sach, cuon sach, hoc sach
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
ve cam » ve cham, ve cac, va cam
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: ((tu sach) or (co sach)) ky nang x hoi. hieu ve cam thuc va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (co sach)) ky nang x hoi. hieu ve cam thuc va hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (co sach)) ky nang x hoi. hieu ve cam thuc va hanh vi cua triet*.