Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
te sach » toc sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
cac tuc » cac toc, cac tu, cac tac
ca dan » cac dan
va cua » va chua, via cua, ca cua

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