Perhaps you should try some spelling variations:
sach tay » xach tay, sach hay, sach nay
tay lang » tai lang, tay tang, tay quang
nam thuc » nam thuoc, am thuc, nam thu
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh de » hanh de, dan de, dang de
ha hoi » hoa hoi, xa hoi, va hoi
ve nam » he nam, va nam, le nam
de cua » le cua, te cua, dieu cua
cua te » cua tu

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 tay lang ((ha hoi) OR (ha noi)). hieu ve nam thuc va danh de cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach tay lang ((ha hoi) OR (ha noi)). hieu ve nam thuc va danh de cua te".
• Adding a wildcard symbol may retrieve word variants: so sach tay lang ((ha hoi) OR (ha noi)). hieu ve nam thuc va danh de cua te*.