Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
cac tuc » cac toc, cac tu, cac tac
va dan » va dao, va dau, va dap
ca dan » cac dan, ca dao

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 ky dang xa hoi. lieu va cac tuc ((va dan) or (ca dan)) va ((su triet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. lieu va cac tuc ((va dan) OR (ca dan)) va ((su triet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. lieu va cac tuc ((va dan) or (ca dan)) va ((su triet) or (cua vat))*.