Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
ve triet » va trien, su triet
cac duc » cac du, cac dac, cac nuoc
cao duc » dao duc, cao suc, giao duc
hieu va » lieu va, hieu qua
lang ha » long ha
hieu ve » hieu van
ky lang » ky nang, ky dang, ky tang
sai ky » sac ky
lap ve » dap ve, lap va, tap ve
su sai » su tai, su hai, su dai

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

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