Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
cham thuc » nham thuc, pham thuc, tham thuc
day hanh » day nhanh, dao hanh, day manh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
vu cac » va cac, tu cac, ve cac
de cua » le cua, dieu cua
te cua » tue 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 cac ky nang x hoi. hieu ve cham thuc ((day hanh) or (day thanh)) ((de cua) OR (te cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu cac ky nang x hoi. hieu ve cham thuc ((day hanh) OR (day thanh)) ((de cua) OR (te cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu cac ky nang x hoi. hieu ve cham thuc ((day hanh) or (day thanh)) ((de cua) OR (te cua)) tre".
• Adding a wildcard symbol may retrieve word variants: vu cac ky nang x hoi. hieu ve cham thuc ((day hanh) or (day thanh)) ((de cua) OR (te cua)) tre*.