Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thuc ban » thuoc ban, thuc dan, thu ban
cam thuc » am thuc, nam thuc, cam thu
hieu va » lieu va, hieu qua
van cua » vang cua, dan cua, nan cua
ban cua » ban quan
so sac » so sach, so dac
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sac ky nang ((x hoi) or (x ho)). hieu va cam thuc ban thanh ((van cua) OR (ban cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ky nang ((x hoi) OR (x ho)). hieu va cam thuc ban thanh ((van cua) OR (ban cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sac ky nang ((x hoi) or (x ho)). hieu va cam thuc ban thanh ((van cua) OR (ban cua)) tre".
• Adding a wildcard symbol may retrieve word variants: so sac ky nang ((x hoi) or (x ho)). hieu va cam thuc ban thanh ((van cua) OR (ban cua)) tre*.