Perhaps you should try some spelling variations:
day nhanh » day thanh, duy nhanh, dac nhan
cua triet » cua viet, su triet, va triet
cam thuc » am thuc, nam thuc, cam thu
dao hanh » dao thanh, dang hanh, ban hanh
bach ky » bac ky
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, dua tren
va cam » va cham, va cac, va cao
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 va cam thuc ((dao hanh) or (day nhanh)) di ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ky nang x hoi. hieu va cam thuc ((dao hanh) OR (day nhanh)) di ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: vu bach ky nang x hoi. hieu va cam thuc ((dao hanh) or (day nhanh)) di ((cua tre) or (cua triet))*.