Perhaps you should try some spelling variations:
day nhanh » day thanh, duy nhanh, dac nhan
cham thuc » nham thuc, pham thuc, tham thuc
day hanh » day thanh, dao hanh, day manh
ha manh » ho manh, ha anh, ha thanh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
sac ky » cac ky, sai ky
vu sac » vu sach, vu san, va sac
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 sac ky nang x hoi. hieu ve cham thuc ((((day hanh) or (ha manh))) or (day nhanh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang x hoi. hieu ve cham thuc ((((day hanh) OR (ha manh))) OR (day nhanh)) dai cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sac ky nang x hoi. hieu ve cham thuc ((((day hanh) or (ha manh))) or (day nhanh)) dai cua tre*.