Perhaps you should try some spelling variations:
vat danh » va danh, van danh, luat danh
cau thuc » cau truc, cuu thuc, can thuc
danh ca » dan ca, doanh cua, danh cho
sach ty » sach y, sach thu, xach tay
hieu ke » hieu kem, chieu ke, hieu ve
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach uu
cua tre » cua te, cuu tre, cua triet
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) or (sach tu)) nang xa hoi. ((hieu ke) OR (hieu ky)) cau thuc vat danh ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) nang xa hoi. ((hieu ke) OR (hieu ky)) cau thuc vat danh ca cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach tu)) nang xa hoi. ((hieu ke) OR (hieu ky)) cau thuc vat danh ca cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach tu)) nang xa hoi. ((hieu ke) OR (hieu ky)) cau thuc vat danh ca cua tre*.