Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
thai cua » than cua, tai cuc, tri cua
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
vai cua » dai cua, hai cua, lai cua
su xac » pu xac, su cac
xac ky » cac ky, sac ky, bac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ky lang xa hoi. hieu van ((nam thuc) or (lam thuoc)) ban thanh ((vai cua) or (thai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky lang xa hoi. hieu van ((nam thuc) OR (lam thuoc)) ban thanh ((vai cua) OR (thai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: su xac ky lang xa hoi. hieu van ((nam thuc) or (lam thuoc)) ban thanh ((vai cua) or (thai cua)) tre*.