Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
thuoc van » thuoc va, thuc van, thuoc ban
hang hai » hoang hai, hang tai, thanh hai
dang xay » dang van, van xay
hanh hai » thanh hai, nhanh hai, hanh tai
cuu tre » cua tre, cau tren, cau treo
hieu le » hieu ve, hieu he, hieu ly
san ky » sang ky, van ky, dan ky
le nam » ly nam, he nam, le na
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky ((nang x) or (dang xay)) hoi. hieu le nam thuoc van ((hanh hai) OR (hang hai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky ((nang x) OR (dang xay)) hoi. hieu le nam thuoc van ((hanh hai) OR (hang hai)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky ((nang x) or (dang xay)) hoi. hieu le nam thuoc van ((hanh hai) OR (hang hai)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu san ky ((nang x) or (dang xay)) hoi. hieu le nam thuoc van ((hanh hai) OR (hang hai)) cuu tre*.