Perhaps you should try some spelling variations:
dung thoi » dung thi, dung toi, dung thuoc
dung hoi » duong hoi, dung hoai, dung hoc
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
so sac » so sach, so dac
sac ky » cac ky, sai ky
ve am » va am

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 ho. hieu ve am thuc va ((dung hoi) OR (dung thoi)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sac ky nang x ho. hieu ve am thuc va ((dung hoi) OR (dung thoi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: so sac ky nang x ho. hieu ve am thuc va ((dung hoi) OR (dung thoi)) cua tre*.