Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
va thanh » ban thanh, va tinh, le thanh
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cua tu » cua tuc, cua cu, cua te
vu sai » vu hai, vu san, vu dai
sai ky » sac ky
ve nam » he nam, va nam, le nam
ma hoi » mai hoi, xa hoi, ma hoa
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 ma hoi. hieu ve nam thuoc ((va thanh) or (gia thanh)) vi ((cua tu) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sai ky nang ma hoi. hieu ve nam thuoc ((va thanh) OR (gia thanh)) vi ((cua tu) OR (cua su)).
• Adding a wildcard symbol may retrieve word variants: vu sai ky nang ma hoi. hieu ve nam thuoc ((va thanh) or (gia thanh)) vi ((cua tu) or (cua su))*.