Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh dai » thanh hai, thanh tai, thanh dat
cam thuc » am thuc, nam thuc, cam thu
thuc van » thuc vat, thuc dan, thuc va
so sach » so sanh, bo sach, co sach
sach xa » sach dao, sach nha, sach bai
mang xa » lang xa, mang may, dang xay
hieu ve » hieu va, hieu van
dai cuu » dai cua, dai huu
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam

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 xa ((mang xa) or (nang x)) hoi. hieu ve cam thuc van thanh dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach xa ((mang xa) OR (nang x)) hoi. hieu ve cam thuc van thanh dai cuu tre.
• Adding a wildcard symbol may retrieve word variants: so sach xa ((mang xa) or (nang x)) hoi. hieu ve cam thuc van thanh dai cuu tre*.