Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
nang hoc » nang doc, nang luc, dong hoc
nang hoi » nang noi, nang ho, nang hai
sach ky » sac ky, sach y, sach ty
te sach » toc sach
cac tuc » cac toc, cac tu, cac tac
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
ve cac » va cac, vien cac

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 ky lang xa hoi. hieu ve cac tuc xa ((nang hoi) or (nang hoc)) ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu ve cac tuc xa ((nang hoi) OR (nang hoc)) ((cua triet) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu ve cac tuc xa ((nang hoi) or (nang hoc)) ((cua triet) OR (su triet))*".