Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
ky danh » ky anh
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
ky dang » ky nang
thuc va » thuc dan, thuc day
dan vai » dan va, dan tai, dan vat
vai cua » dai cua, hai cua, lai cua
va nam » van nam, ha nam, va nay

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((ky dang) or (ky danh)) xay hoi. hieu va nam ((thuc va) OR (thuc vat)) dan vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ky dang) OR (ky danh)) xay hoi. hieu va nam ((thuc va) OR (thuc vat)) dan vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ky dang) or (ky danh)) xay hoi. hieu va nam ((thuc va) OR (thuc vat)) dan vai cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach ((ky dang) or (ky danh)) xay hoi. hieu va nam ((thuc va) OR (thuc vat)) dan vai cua triet*.