Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang doi » nang doc, nang noi, hang doi
doi cua » dai cua, hoi cua
da nang » cam nang, kha nang, cao nang
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
cac tuc » cac toc, cac tac, cac nuoc
cac tu » cac thu, cach tu, cac du
sac ky » cac ky, sai ky

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

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