Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
van thanh » ban thanh, van tuan
thuc van » thuc vat, thuc dan, thuc va
thanh va » thanh van, hanh va, thanh ha
hieu thi » sieu thi, hieu chi, hiep thi
thi cham » thi hai, toc cham, thi ha
cua tre » cua te, cua triet, dua tren
so sach » so sanh, bo sach, co sach
sach tu » sach thu, cach tu, sach ty
hoa hoi » khoa hoi, hoa doi, hoc hoi
cuu tre » cau tren, cau treo

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 tu dong ((hoa hoi) or (hoa hoc)). hieu thi cham thuc van thanh va ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach tu dong ((hoa hoi) OR (hoa hoc)). hieu thi cham thuc van thanh va ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: so sach tu dong ((hoa hoi) or (hoa hoc)). hieu thi cham thuc van thanh va ((cua tre) or (cuu tre))*.