Perhaps you should try some spelling variations:
thanh lam » thanh lap, hanh lam, thanh nam
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
va thanh » gia thanh, ban thanh, va tinh
cac duc » cac du, cao duc, cac dac
hieu va » lieu va, hieu qua
hieu ve » hieu van
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
hai ky » thai ky, hoi ky, hai ly
su hai » su tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su hai ky lang ha noi. ((hieu ve) or (hieu va)) cac duc va thanh lam ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su hai ky lang ha noi. ((hieu ve) OR (hieu va)) cac duc va thanh lam ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su hai ky lang ha noi. ((hieu ve) or (hieu va)) cac duc va thanh lam ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: su hai ky lang ha noi. ((hieu ve) or (hieu va)) cac duc va thanh lam ((cua triet) OR (su triet))*.