Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
cua triet » cua viet, su triet, va triet
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky ((nang cao) or (tang ma)) hoa. hieu va tham thuc va hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((nang cao) OR (tang ma)) hoa. hieu va tham thuc va hanh di cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((nang cao) or (tang ma)) hoa. hieu va tham thuc va hanh di cua triet*.