Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh lap » thanh san, phan lap, thanh hai
va thanh » gia thanh, ban thanh, va tinh
cac duc » cac du, cao duc, cac nuoc
lap cua » lai cua, tap cua, lam cua
cac dac » cac dan, cac dai, cac bac
lang ha » long ha
hieu va » lieu va
ky lang » ky nang, ky dang, ky tang
sai ky » sac ky
ha hoi » hoa hoi, ha noi, xa hoi
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 hoi. ((hieu va) OR (hieu qua)) ((cac duc) or (cac dac)) va thanh lap cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky lang ha hoi. ((hieu va) OR (hieu qua)) ((cac duc) OR (cac dac)) va thanh lap cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ky lang ha hoi. ((hieu va) OR (hieu qua)) ((cac duc) or (cac dac)) va thanh lap cua triet".
• Adding a wildcard symbol may retrieve word variants: su sai ky lang ha hoi. ((hieu va) OR (hieu qua)) ((cac duc) or (cac dac)) va thanh lap cua triet*.