Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang di » hang doi, hang vi, hang dien
nang di » nang du, nang ji, nang si
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
lang xa » lang ha, dang xay, lang van
ve cac » va cac, vien cac
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, tuc xa

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

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