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
nang ma » tang ma, nang cao
sang ma » tang ma, sang tao, sang tai
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
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: thu sach y ((nang ma) or (((sang ma) OR (mang may)))) hoa. hieu va tham thuc va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang ma) OR (((sang ma) OR (mang may)))) hoa. hieu va tham thuc va hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((nang ma) or (((sang ma) OR (mang may)))) hoa. hieu va tham thuc va hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang ma) or (((sang ma) OR (mang may)))) hoa. hieu va tham thuc va hanh vi cua triet*.