Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cuon sach » duong sach, cuoc cach, co sach
nham thuc » nhan thuc, nam thuc, nham thu
tham tuc » tham thuc, thai tuc, pham thuc
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
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 (cuon sach)) ky nang x hoi. hieu va ((tham tuc) OR (nham thuc)) va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (cuon sach)) ky nang x hoi. hieu va ((tham tuc) OR (nham thuc)) va hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (cuon sach)) ky nang x hoi. hieu va ((tham tuc) OR (nham thuc)) va hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (cuon sach)) ky nang x hoi. hieu va ((tham tuc) OR (nham thuc)) va hanh vi cua triet*.