Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
van thanh » ban thanh, van tuan
mai khoi » mai khoa, tai khoa, cac khoi
thanh vi » hanh vi, thanh va, thanh ve
toc sach » hoc sach, doc sach, thuoc sach
thu sach » tu sach, thuat sach, thuoc sach
dai hoi » dai hoc, dai hai, dai moi
hieu va » lieu va, hieu qua
cac vuc » cac nuoc, cac vung, cac cuoc
vuc van » duc van, luc van, thuc van
o lang » hoa lang, hoi lang
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: ((toc sach) or (thu sach)) o lang ((dai hoi) or (mai khoi)). hieu va cac vuc van thanh vi cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thu sach)) o lang ((dai hoi) OR (mai khoi)). hieu va cac vuc van thanh vi cua thuoc.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (thu sach)) o lang ((dai hoi) or (mai khoi)). hieu va cac vuc van thanh vi cua thuoc*.