Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
hang dieu » hoang dieu, dang dieu, hang dien
toc sach » hoc sach, doc sach, thuoc sach
dieu cua » dieu tra
thuc va » thuc vat, thuc dan, thuc day
mang xa » mang may, dang xay, mang cua
lang xa » lang ha, dang xay, lang van
hieu va » lieu va
sach tu » sach thu, cach tu, sach ty
va hang » van hang, va nang, va lang
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: toc sach tu ((mang xa) or (lang xa)) hoi. ((hieu va) or (hieu qua)) cham thuc va hang dieu cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu ((mang xa) OR (lang xa)) hoi. ((hieu va) OR (hieu qua)) cham thuc va hang dieu cua te.
• Adding a wildcard symbol may retrieve word variants: toc sach tu ((mang xa) or (lang xa)) hoi. ((hieu va) or (hieu qua)) cham thuc va hang dieu cua te*.