Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
nang ho » nang hoc, nang co, nang cao
tang ho » tang cho, tung ho, tang ha
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va 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: thuoc sach ky ((nang ho) OR (tang ho)) hai. ((hieu ve) or (lieu va)) nam thuc va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky ((nang ho) OR (tang ho)) hai. ((hieu ve) OR (lieu va)) nam thuc va hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky ((nang ho) OR (tang ho)) hai. ((hieu ve) or (lieu va)) nam thuc va hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky ((nang ho) OR (tang ho)) hai. ((hieu ve) or (lieu va)) nam thuc va hanh vi cua triet*.