Perhaps you should try some spelling variations:
danh nhan » doanh nhan, thanh nhan, benh nhan
day hanh » day nhanh, day thanh, dao hanh
dac nhan » cac nhan, ca nhan, cac nha
bach ky » bac ky
nang xa » nang x, lang xa, nang ma
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

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