Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang hoi » nang noi, nang hoc, nang ho
cac toc » cac toi, cac nuoc, cac thoi
hoi cua » hoi chuc
xa nang » da nang, va nang, xa nong
te sach » toc sach
hieu ve » hieu va, hieu van
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land
cac tu » cac thu, cach tu, cac du

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((y lang) OR (_ lang)) xa hoi. hieu ve ((cac tu) or (cac toc)) xa nang hoi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y lang) OR (_ lang)) xa hoi. hieu ve ((cac tu) OR (cac toc)) xa nang hoi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y lang) OR (_ lang)) xa hoi. hieu ve ((cac tu) or (cac toc)) xa nang hoi cua triet*".