Perhaps you should try some spelling variations:
cong thuoc » cong thuc, dong thuoc, long thuoc
hoc nhanh » hoc phan
sach hoi » sach doi, sach moi, cach thoi
cuu dong » cuu cong, cuu tong, cuu long
thuoc xa » thuoc ma, thuoc va, thuoc la
te sach » toc sach
van tai » von tai, van tuan

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach hoi dap, nghien cuu dong ((hoc nganh) OR (hoc nhanh)) cong thuoc xa hoi va van tai~".
• Adding a wildcard symbol may retrieve word variants: te sach hoi dap, nghien cuu dong ((hoc nganh) OR (hoc nhanh)) cong thuoc xa hoi va van tai*.