Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
toc sach » hoc sach, doc sach, thuoc sach
xang xa » lang xa, ang xa, dang xay
mang xa » lang xa, mang may, dang xay
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
vai cua » dai cua, hai cua, lai cua
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) ty ((xang xa) or (mang xa)) hoi. hieu ve cam duc ban hanh vai cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty ((xang xa) OR (mang xa)) hoi. hieu ve cam duc ban hanh vai cua thuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ty ((xang xa) or (mang xa)) hoi. hieu ve cam duc ban hanh vai cua thuoc".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ty ((xang xa) or (mang xa)) hoi. hieu ve cam duc ban hanh vai cua thuoc*.