Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua thuoc » nha thuoc, cay thuoc, cua nuoc
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
v nang » va nang, vu nang, van nang
y nang » ky nang, ly nang, may nang
va cam » va cham, va cac, va cao
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: ((tu sach) or (thuoc sach)) ((y nang) or (v nang)) mai hoi. hieu va cam xuc van hanh vi cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuoc sach)) ((y nang) OR (v nang)) mai hoi. hieu va cam xuc van hanh vi cua thuoc.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuoc sach)) ((y nang) or (v nang)) mai hoi. hieu va cam xuc van hanh vi cua thuoc*.