Perhaps you should try some spelling variations:
day nhanh » day thanh, duy nhanh, dac nhan
nhan thuc » nhan luc, dan thuc, toan thuc
khach ky » hanh ky, thanh ky
day manh » van manh, duc manh, ha manh
hieu ve » hieu va, hieu van
ve nhan » ve nha, de nhan, va nhan
cua tre » cua te, cuu tre, cua triet
le cua » ly cua
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: vay khach ky nang x hoi. hieu ve nhan thuc ((day manh) or (day nhanh)) le cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vay khach ky nang x hoi. hieu ve nhan thuc ((day manh) OR (day nhanh)) le cua tre.
• Adding a wildcard symbol may retrieve word variants: vay khach ky nang x hoi. hieu ve nhan thuc ((day manh) or (day nhanh)) le cua tre*.