Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
va triet » va thiet, va trien, ve triet
hanh tai » thanh tai, hang tai, han tai
dang xay » dang van, van xay
thuoc va » thuc va, thuoc ma, thuong va
nang xa » nang x, lang xa, nang ma
hieu le » hieu ve, hieu he, hieu ly
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
le nam » ly nam, he nam, le na

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky ((nang xa) or (dang xay)) hoi. hieu le nam thuoc va ((hanh vi) or (hanh tai)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((nang xa) OR (dang xay)) hoi. hieu le nam thuoc va ((hanh vi) OR (hanh tai)) va triet.
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((nang xa) or (dang xay)) hoi. hieu le nam thuoc va ((hanh vi) or (hanh tai)) va triet*.