Perhaps you should try some spelling variations:
cham thuc » nham thuc, pham thuc, tham thuc
dung doi » huong doi, dung tai, dung co
danh doi » danh di, thanh doi, danh hoa
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
nang xa » nang x, lang xa, nang ma
sac ky » cac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sac ky) or (sai ky)) nang xa hoi. hieu vu cham thuc va ((danh doi) OR (dung doi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (sai ky)) nang xa hoi. hieu vu cham thuc va ((danh doi) OR (dung doi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sac ky) or (sai ky)) nang xa hoi. hieu vu cham thuc va ((danh doi) OR (dung doi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) or (sai ky)) nang xa hoi. hieu vu cham thuc va ((danh doi) OR (dung doi)) cua tre*.