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
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
hieu ve » hieu va, hieu van
cac dac » cac dan, cac dai, cac bac
su sai » su tai, su hai, su mai
ha hoi » hoa hoi, ha noi, xa hoi
su dai » sau dai, si dai, 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 sai) OR (su dai)) ky lang ha hoi. hieu ve ((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) OR (su dai)) ky lang ha hoi. hieu ve ((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) OR (su dai)) ky lang ha hoi. hieu ve ((cac duc) or (cac dac)) va thanh lap cua triet*".