Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
cua tuc » cua duc, cua tu, cua thuoc
vu sai » vu hai, vu san, vu dai
sai ky » sac ky
ve nam » he nam, va nam, le nam
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sai ky nang cao hoi. hieu ve nam thuoc ((le thanh) or (gia thanh)) vi ((cua tuc) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sai ky nang cao hoi. hieu ve nam thuoc ((le thanh) OR (gia thanh)) vi ((cua tuc) OR (cua su)).
• Adding a wildcard symbol may retrieve word variants: vu sai ky nang cao hoi. hieu ve nam thuoc ((le thanh) or (gia thanh)) vi ((cua tuc) or (cua su))*.