Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
tan hanh » tan thanh, tang hanh, toan hanh
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
tai cua » thai cua, tai cuc, tri cua
va cam » va cham, va cac, va cao

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