Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nam thuc » nam thuoc, am thuc, nam thu
sach ty » sach y, sach tu, sach thu
tai cuu » tai cuc, tai buu, tai cua
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty ((sang ma) or (nang x)) hoi. hieu ve nam thuc va hanh ((tai cuu) or (tri cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((sang ma) OR (nang x)) hoi. hieu ve nam thuc va hanh ((tai cuu) OR (tri cua)) tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((sang ma) or (nang x)) hoi. hieu ve nam thuc va hanh ((tai cuu) or (tri cua)) tre*.