Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
ve triet » va trien, su triet
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
hieu ve » hieu van
hieu va » lieu va, hieu qua
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
lap ve » dap ve, lap va, tap ve

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

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