Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tham thuc » nham thuc, pham thuc, tam thuc
va thanh » gia thanh, ban thanh, va tinh
va hanh » van hanh, va danh, ban hanh
so sach » bo sach, co sach, hoc sach
hieu ve » hieu va, hieu van
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
so sanh » do sanh
ve tham » va tham, ve cham, vi tham

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 (so sanh)) ky tang xa hoi. hieu ve tham thuc ((va hanh) or (va thanh)) dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ky tang xa hoi. hieu ve tham thuc ((va hanh) OR (va thanh)) dai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (so sanh)) ky tang xa hoi. hieu ve tham thuc ((va hanh) or (va thanh)) dai cua triet*".