Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
ban hanh » ban hang
hanh lai » hanh lam, hanh tai, thanh lap
te sach » toc sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, ang xa, dang xay
mang xa » lang xa, mang may, dang xay
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
duc ban » duc tan, duc van, dua ban
lai cua » dai cua, hai cua, lai chau

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 ty ((xang xa) or (mang xa)) hoi. hieu va pham duc ban hanh lai cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((xang xa) OR (mang xa)) hoi. hieu va pham duc ban hanh lai cua thuoc.
• Adding a wildcard symbol may retrieve word variants: te sach ty ((xang xa) or (mang xa)) hoi. hieu va pham duc ban hanh lai cua thuoc*.