Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, cam thu
hoc cac » hoc cao
hanh de » hanh ve, hanh kem
danh di » danh du, xanh di, danh dien
qua cam » qua cham, qua cac, qua ca
nang xa » lang xa, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet
cac ty » cac ky, cac tu

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

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