Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
cham thuc » nham thuc, pham thuc, tham thuc
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
so sach » so sanh, bo sach, co sach
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (thuoc sach)) ky dang xa hoi. ((hieu ve) or (lieu va)) cham thuc va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (thuoc sach)) ky dang xa hoi. ((hieu ve) OR (lieu va)) cham thuc va hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (thuoc sach)) ky dang xa hoi. ((hieu ve) or (lieu va)) cham thuc va hanh vi cua triet*.