Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
kho tang » cao tang
hanh hai » thanh hai, nhanh hai, hang hai
ky tang » ky nang, ky dang, ky trong
cao duc » dao duc, cao suc, giao duc
duc van » duc va, duc tan, duc manh
hieu ve » hieu va, hieu van
su tien » su kien, su hien, tu tieng
ve cao » va cao, ve bao, ve cac

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

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