Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
thu sach » thuat sach, thuoc sach, thu hoach
thuoc va » thuc va, thuoc ma, thuong va
tu sach » su sach, te sach, tu cach
hieu le » hieu ve, hieu he, hieu ly
va hanh » van hanh, va thanh, va danh
sang ma » tang ma, nang ma, sang tao
vi cua » vai cua, di cua
le lam » de lam, se lam, ke lam
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thu sach)) ky ((mang may) or (sang ma)) hoi. hieu le lam thuoc va hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky ((mang may) OR (sang ma)) hoi. hieu le lam thuoc va hanh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky ((mang may) or (sang ma)) hoi. hieu le lam thuoc va hanh vi cua tu*.