Perhaps you should try some spelling variations:
sach kem » hanh kem
dung doi » huong doi, dung tai, dung co
cua tre » cuu tre, cua triet, dua tren
xa dung » xay dung, xa dong, va dung
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
cam tu » cam thu, nam tu, dam tu
sac ky » cac ky, sai ky
cua te » cua tu
tu xa » tu xay, tu va, te xa
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: so ((sach kem) or (sac ky)) nang x hoi. hieu va cam tu xa dung doi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach kem) OR (sac ky)) nang x hoi. hieu va cam tu xa dung doi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: so ((sach kem) or (sac ky)) nang x hoi. hieu va cam tu xa dung doi ((cua tre) or (cua te))*.