Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
nang tai » hang tai, tang tai, sang tai
thanh vi » hanh vi, thanh va, thanh ve
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
tu sach » thu sach, su sach, te sach
hieu ve » hieu va
nang ma » tang ma, sang ma, nang cao
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: tu sach y ((nang tai) or (nang ma)) hoi. ((hieu ve) or (hieu van)) cam duc ban thanh vi cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang tai) OR (nang ma)) hoi. ((hieu ve) OR (hieu van)) cam duc ban thanh vi cua thuoc.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang tai) or (nang ma)) hoi. ((hieu ve) or (hieu van)) cam duc ban thanh vi cua thuoc*.