Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc van » thuc vat, thuc dan, thuc va
cam thuc » am thuc, nam thuc, cam thu
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
co sach » bo sach, cuon sach, hoc sach
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, 5 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 (co sach)) ky nang ((x hoi) OR (x ho)). hieu ve cam thuc van 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) OR (x ho)). hieu ve cam thuc van hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (co sach)) ky nang ((x hoi) OR (x ho)). hieu ve cam thuc van hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (co sach)) ky nang ((x hoi) OR (x ho)). hieu ve cam thuc van hanh vi cua triet*.