Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
sach thue » sach thu, sach thieu, sach tham
day thanh » dao thanh, dat thanh, da thanh
cham thuc » nham thuc, pham thuc, tham thuc
thanh va » thanh van, hanh va, thanh ha
thuc day » thuc dan, thuc vat
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
hang ca » hang va, nang cao, hang tai
hang ma » hang va, tang ma, nang ma
so sach » so sanh, bo sach, co sach
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 thue ((hang ma) OR (hang ca)) hoi. hieu ve cham thuc day thanh va cua thuoc~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thue ((hang ma) OR (hang ca)) hoi. hieu ve cham thuc day thanh va cua thuoc".
• Adding a wildcard symbol may retrieve word variants: so sach thue ((hang ma) OR (hang ca)) hoi. hieu ve cham thuc day thanh va cua thuoc*.