Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua thuoc » nha thuoc, cay thuoc, cua nuoc
cac quoc » cac nuoc, cac cuoc, cao quoc
quoc ban » quoc bao, quoc lan, quoc quan
ban hanh » ban hang
hieu ve » hieu va, hieu van
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
ma hoi » mai hoi, ma hoa, me hoi
ve cac » va cac, vien cac
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 v nang ((ma hoi) or (xa hoi)). hieu ve cac quoc ban hanh vi cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach v nang ((ma hoi) OR (xa hoi)). hieu ve cac quoc ban hanh vi cua thuoc.
• Adding a wildcard symbol may retrieve word variants: thuoc sach v nang ((ma hoi) or (xa hoi)). hieu ve cac quoc ban hanh vi cua thuoc*.