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