Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
te sach » toc sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
sach ky » sac ky, sach y, sach ty
va dan » va dao, va dau, va dap
ca dan » cac dan, ca dao
cua te » cua tu

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