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