Perhaps you should try some spelling variations:
day nhanh » day thanh, duy nhanh, dac nhan
cam thuc » am thuc, nam thuc, cam thu
day hanh » day thanh, dao hanh, day manh
ly nang » ky nang, ly hang, ly vang
hieu va » lieu va, hieu qua
hieu ve » hieu van
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho
bach » sach, cach, bac

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 ly nang x hoi. ((hieu ve) or (hieu va)) cam thuc ((day hanh) or (day nhanh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ly nang x hoi. ((hieu ve) OR (hieu va)) cam thuc ((day hanh) OR (day nhanh)) di cua tre.
• Adding a wildcard symbol may retrieve word variants: vu bach ly nang x hoi. ((hieu ve) or (hieu va)) cam thuc ((day hanh) or (day nhanh)) di cua tre*.