Perhaps you should try some spelling variations:
sach kem » hanh kem
cam tuc » cam xuc, cam tu, nam thuc
cua tuc » cua duc, cua tu, cua thuoc
dao hai » dao thai, dai hai, do hai
hieu va » lieu va, hieu qua
va dao » ca dao
tuc va » thuc va, truc va, tuc xa
va cam » va cham, va cac, va cao
nang o » nang co, nang ho, nang ro
sac ky » cac ky, sai ky
cua su » qua su
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach kem) or (sac ky)) nang o hoi. hieu va cam tuc va dao hai ((cua tuc) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach kem) OR (sac ky)) nang o hoi. hieu va cam tuc va dao hai ((cua tuc) OR (cua su)).
• Adding a wildcard symbol may retrieve word variants: te ((sach kem) or (sac ky)) nang o hoi. hieu va cam tuc va dao hai ((cua tuc) or (cua su))*.