Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cac thuc » cach thuc, cac thu, can thuc
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
thuc va » thuc vat, thuc dan, thuc day
dan dai » dat dai, can dai, dan dat
va dan » ca dan, va dao, va dau

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) OR (su sach)) ky dang xa hoi. lieu va cac thuc va dan dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky dang xa hoi. lieu va cac thuc va dan dai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky dang xa hoi. lieu va cac thuc va dan dai cua triet*.