Perhaps you should try some spelling variations:
thuoc ngan » thuoc nhan, thu ngan, thuoc ban
nam thuoc » nam thuc, nam thu, nha thuoc
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
sach tu » sach thu, cach tu, sach ty
hang ve » hang va, hanh ve, hang ke
cuu tre » cua tre, cau tren, cau treo
ve cuu » ve cau, ve chu, ve cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach ky) or (sach tu)) nang x hoi. hieu van nam thuoc ngan hang ve cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach ky) OR (sach tu)) nang x hoi. hieu van nam thuoc ngan hang ve cuu tre.
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ky) or (sach tu)) nang x hoi. hieu van nam thuoc ngan hang ve cuu tre*.