Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
danh dai » danh dau, danh di, danh sai
hieu va » lieu va
thuc va » thuc vat, thuc day
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
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 ky nang x hoi. ((hieu va) or (hieu qua)) am ((thuc va) OR (thuc dan)) danh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang x hoi. ((hieu va) OR (hieu qua)) am ((thuc va) OR (thuc dan)) danh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang x hoi. ((hieu va) or (hieu qua)) am ((thuc va) OR (thuc dan)) danh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang x hoi. ((hieu va) or (hieu qua)) am ((thuc va) OR (thuc dan)) danh dai cua tre*.