Perhaps you should try some spelling variations:
cua triet » su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
duc tuan » duc thuan, duc tan, duc toan
cua viet » ca viet, hoa viet, cua vat
hieu ve » hieu va, hieu van
cao duc » dao duc, cao suc, giao duc
y nang » ly nang, v nang, may nang
ve cao » va cao, ve bao, ve cac
anh va » hanh va
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: thu sach ((y nang) or (ky nang)) x hoi. hieu ve cao duc tuan anh va ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (ky nang)) x hoi. hieu ve cao duc tuan anh va ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) or (ky nang)) x hoi. hieu ve cao duc tuan anh va ((cua triet) or (cua viet))*.