Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
lam thuc » lam thuoc, nam thuc, dam thuc
danh dai » danh dau, danh di, vanh dai
danh sai » dung sai, danh bat, danh dau
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 van ((lam thuc) OR (am thuc)) va ((danh dai) or (danh sai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang x hoi. hieu van ((lam thuc) OR (am thuc)) va ((danh dai) OR (danh sai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang x hoi. hieu van ((lam thuc) OR (am thuc)) va ((danh dai) or (danh sai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang x hoi. hieu van ((lam thuc) OR (am thuc)) va ((danh dai) or (danh sai)) cua tre*.