Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
lam xuc » cam xuc, lam duoc
nang ma » tang ma, sang ma, nang cao
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sac ky) OR (sai ky)) nang ma hoi. hieu van ((lam xuc) or (nam thuoc)) ban hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sac ky) OR (sai ky)) nang ma hoi. hieu van ((lam xuc) OR (nam thuoc)) ban hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sac ky) OR (sai ky)) nang ma hoi. hieu van ((lam xuc) or (nam thuoc)) ban hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sac ky) OR (sai ky)) nang ma hoi. hieu van ((lam xuc) or (nam thuoc)) ban hanh vi cuu tre*.