Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, pham thuoc
thu huong » thu cong
tham thuc » nham thuc, pham thuc, tam thuc
day thanh » dao thanh, dat thanh, da thanh
cua thuoc » nha thuoc, cay thuoc, cua nuoc
sach thu » sach thue, sach thieu, sach tham
huong ma » huong mai, thuong ma, cuong ma
thanh va » thanh van, hanh va, thanh ha
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
ma hoi » mai hoi, xa hoi, ma hoa
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thu huong ma hoi. hieu ve ((cham thuc) or (tham thuc)) day thanh va cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu huong ma hoi. hieu ve ((cham thuc) OR (tham thuc)) day thanh va cua thuoc.
• Adding a wildcard symbol may retrieve word variants: so sach thu huong ma hoi. hieu ve ((cham thuc) or (tham thuc)) day thanh va cua thuoc*.