Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc anh
nam thuc » nam thuoc, am thuc, nam thu
hoc cac » hoc cao
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
thuc va » thuc vat, 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
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: ((toc sach) or (((hoc sach) OR (hoc cac)))) ky lang xa hoi. lieu va nam thuc va dan vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (((hoc sach) OR (hoc cac)))) ky lang xa hoi. lieu va nam thuc va dan vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (((hoc sach) OR (hoc cac)))) ky lang xa hoi. lieu va nam thuc va dan vai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (((hoc sach) OR (hoc cac)))) ky lang xa hoi. lieu va nam thuc va dan vai cua triet*.