Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
mang mai » mang may, lang mai, mang lai
dam thuc » am thuc, dan thuc, nam thuc
hanh tai » thanh tai, hang tai, han tai
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo
y mang » cay mang
dam tu » nam tu, cam tu, tam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y mang mai hoi. hieu ve ((dam thuc) or (dam tu)) va hanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y mang mai hoi. hieu ve ((dam thuc) OR (dam tu)) va hanh tai cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc sach y mang mai hoi. hieu ve ((dam thuc) or (dam tu)) va hanh tai cuu tre*.