Perhaps you should try some spelling variations:
duong khoa » dung khoa, luong khoa
dong khoa » dung khoa, dong hoa, hong khoa
ban thanh » ban hanh, ban hang
khien tu » dien tu
cham xuc » cam xuc, chat xuc, cham soc
xuc ban » duc ban, cuc ban, quoc ban
so sach » so sanh, bo sach, co sach
tu cham » toc cham, thi cham
sach ky » sac ky, sach y, sach ty
va cua » va chua, via cua, ma cua
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky ((dong khoa) or (duong khoa)) hoi. khien tu cham xuc ban thanh ((va cua) OR (ca cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky ((dong khoa) OR (duong khoa)) hoi. khien tu cham xuc ban thanh ((va cua) OR (ca cua)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky ((dong khoa) or (duong khoa)) hoi. khien tu cham xuc ban thanh ((va cua) OR (ca cua)) tu".
• Adding a wildcard symbol may retrieve word variants: so sach ky ((dong khoa) or (duong khoa)) hoi. khien tu cham xuc ban thanh ((va cua) OR (ca cua)) tu*.