Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
hieu cua » hieu qua, dieu cua, bieu cua
danh dai » danh dau, danh di, danh sai
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
cua tre » cuu tre, cua triet, dua tren
te sac » te sach, te cac, te san
cua am » cua tam, cua nam, cua dam
cua te » cua tu
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: ((te sac) or (vien cac)) ky nang x hoi. hieu cua am thuc va danh dai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (vien cac)) ky nang x hoi. hieu cua am thuc va danh dai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (vien cac)) ky nang x hoi. hieu cua am thuc va danh dai ((cua tre) or (cua te))*.