Perhaps you should try some spelling variations:
bach thuoc » bach tuoc, cach thuc, ban thuoc
bieu hien » dieu hien, dieu khien, bien phien
hien bach » vien bach, thien hach, hien hanh
va thanh » gia thanh, ban thanh, va tinh
dang xay » dang van, van xay
thuoc va » thuc va, thuoc ma, thuong va
nha cua » nhat cua, nhan cua, nghia cua
hoa cua » hoa chat, hoa xuat
lang xa » lang ha, lang van
ban ky » van ky, dan ky
tu ban » thu ban, te ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ban ky ((lang xa) OR (dang xay)) hoi. bieu hien bach thuoc va thanh ((hoa cua) or (nha cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ban ky ((lang xa) OR (dang xay)) hoi. bieu hien bach thuoc va thanh ((hoa cua) OR (nha cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ban ky ((lang xa) OR (dang xay)) hoi. bieu hien bach thuoc va thanh ((hoa cua) or (nha cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu ban ky ((lang xa) OR (dang xay)) hoi. bieu hien bach thuoc va thanh ((hoa cua) or (nha cua)) tre*.