Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
dien cua » dien cuc, dien cu, tien cua
tang lai » trang lai, tang tai, tang loi
dieu cua » dieu tra
ky tang » ky nang, ky dang, kho tang
lai hoi » dai hoi, lai hoa, lai roi
cam tuc » cam xuc, cam tu, nam thuc
va danh » va dinh, va dan, va hanh
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky tang lai hoi. hieu qua ((cam tuc) OR (nam thuoc)) va danh ((dien cua) OR (dieu cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky tang lai hoi. hieu qua ((cam tuc) or (nam thuoc)) va danh ((dien cua) OR (dieu cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: vu sac ky tang lai hoi. hieu qua ((cam tuc) or (nam thuoc)) va danh ((dien cua) OR (dieu cua)) tre*.