Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh gia » danh gia, thanh gian, hinh giao
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
sach ky » sach y, sach ty, sach kem
cao duc » dao duc, cao suc, giao duc
gia cua » gian cua, giau cua, gia cuc
cac duc » cac du, cac dac, cac nuoc
sac ky » cac ky, sai ky
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 ky) OR (sac ky)) nang x hoi. hieu ve ((cac duc) or (cao duc)) van hanh gia cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sac ky)) nang x hoi. hieu ve ((cac duc) OR (cao duc)) van hanh gia cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sac ky)) nang x hoi. hieu ve ((cac duc) or (cao duc)) van hanh gia cua triet".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) OR (sac ky)) nang x hoi. hieu ve ((cac duc) or (cao duc)) van hanh gia cua triet*.