Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
cua triet » cua viet, su triet, va triet
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
hieu ve » hieu van
hieu va » lieu va, hieu qua
lap cua » lai cua, tap cua, lam cua
su sai » su tai, su hai, su dai
sai ky » sac ky
du va » dau va, su va, vu va

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 ((du va) OR (tu va)) thanh lap cua 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 ((du va) OR (tu va)) thanh lap cua 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 ((du va) OR (tu va)) thanh lap cua triet".
• Adding a wildcard symbol may retrieve word variants: su sai ky lang ha noi. ((hieu ve) or (hieu va)) cac ((du va) OR (tu va)) thanh lap cua triet*.