Perhaps you should try some spelling variations:
thai thuc » thai thuy, thai tuc, tham thuc
sach kem » hanh kem
hieu van » hieu va, thien van, lieu va
van thai » van thoai, van tai, van hai
cua tre » cua te, cua triet, dua tren
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
thuc va » thuc vat, thuc dan, thuc day
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach kem) or (sac ky)) nang xa hoi. hieu van thai thuc va tinh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach kem) OR (sac ky)) nang xa hoi. hieu van thai thuc va tinh vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su ((sach kem) or (sac ky)) nang xa hoi. hieu van thai thuc va tinh vi ((cua tre) or (cuu tre))*.