Perhaps you should try some spelling variations:
anh thuc » am thuc, dan thuc, anh tu
sach kem » hanh kem
vai cua » dai cua, hai cua, lai cua
don vai » don vi, don va, den vai
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
nang ro » nang co, nang ho, nang ra
ro hoi » co hoi, o hoi, mo hoi
sac ky » cac ky, sai ky
va don » va dong, va doc, va do

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach kem) or (sac ky)) nang ro hoi. hieu ve ((cac hop) or (anh thuc)) va don vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach kem) OR (sac ky)) nang ro hoi. hieu ve ((cac hop) OR (anh thuc)) va don vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach kem) or (sac ky)) nang ro hoi. hieu ve ((cac hop) or (anh thuc)) va don vai cua tre*.