Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van tuan » van quan, van ban, anh tuan
kho tang » cao tang
van hanh » van thanh, ban hanh, van anh
hai cua » thai cua, dai cua, hoi cua
hieu ve » hieu va, hieu van
ky tang » ky nang, ky dang, ky trong
bao duc » dao duc, bao luc, cao duc
su cac » tu cac, su cao, su can
ve bao » te bao, va bao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su cac ((ky tang) or (kho tang)) xa hoi. hieu ve bao duc ((van hanh) or (van tuan)) hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ((ky tang) OR (kho tang)) xa hoi. hieu ve bao duc ((van hanh) OR (van tuan)) hai cua triet.
• Adding a wildcard symbol may retrieve word variants: su cac ((ky tang) or (kho tang)) xa hoi. hieu ve bao duc ((van hanh) or (van tuan)) hai cua triet*.