Perhaps you should try some spelling variations:
danh nhan » doanh nhan, thanh nhan, benh nhan
day hanh » day nhanh, day thanh, dao hanh
cac nhan » ca nhan, cac nha, cam nhan
bach ky » bac ky
ca thuc » can thuc, cay thuc, va thuc
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
qua ca » qua cac, qua cua, qua cai
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ky nang x hoi. hieu qua ca thuc ((day hanh) or (((cac nhan) or (danh nhan)))) doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ky nang x hoi. hieu qua ca thuc ((day hanh) OR (((cac nhan) OR (danh nhan)))) doi cua tre.
• Adding a wildcard symbol may retrieve word variants: vu bach ky nang x hoi. hieu qua ca thuc ((day hanh) or (((cac nhan) or (danh nhan)))) doi cua tre*.