Perhaps you should try some spelling variations:
cong thuoc » dong thuoc, long thuoc, cong thuong
hoc nganh » hoc nhanh
cong thuc » cong tac
sach hoi » sach doi, sach moi, cach thoi
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
te sach » toc sach
van tai » von tai, van tuan

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

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