Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc day » thuc dan, thuc vat
danh sai » dung sai, danh bat, danh dau
danh vai » danh va, doanh van, dang van
sach ty » sach y, sach tu, sach thu
te sach » toc sach
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
va co » vo co

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty lang xa hoi. hieu va co ((thuc day) OR (hoc dan)) ((danh vai) OR (danh sai)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty lang xa hoi. hieu va co ((thuc day) or (hoc dan)) ((danh vai) OR (danh sai)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: te sach ty lang xa hoi. hieu va co ((thuc day) or (hoc dan)) ((danh vai) OR (danh sai)) cua triet*.