Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, can thuc
vat toan » van toan, va toan, nhat toan
toan tai » toan tap, doanh tai, toan ban
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
qua cau » quan cau, qua cac, qua ca
cuc tre » duc tre, cua tre, cuu tre
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. hieu qua cau thuc vat toan tai cuc tre~.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu qua cau thuc vat toan tai cuc tre*.