Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
cham thuc » nham thuc, pham thuc, tham thuc
day nhanh » duy nhanh, dac nhan, day manh
khach ky » hanh ky, thanh ky
vu khach » vu khanh, vu khac, vay khach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang o » nang co, nang ho, nang ro
de cua » le cua, dieu cua
te cua » tue cua, le cua
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu khach ky nang o hoi. hieu ve cham thuc ((day thanh) or (day nhanh)) ((de cua) OR (te cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky nang o hoi. hieu ve cham thuc ((day thanh) OR (day nhanh)) ((de cua) OR (te cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ky nang o hoi. hieu ve cham thuc ((day thanh) or (day nhanh)) ((de cua) OR (te cua)) tre*".