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 cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
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 cong hoc nganh ((cong thuoc) or (cong thuc)) xa hoi va van tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach hoi dap, nghien cuu cong 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 cong hoc nganh ((cong thuoc) or (cong thuc)) xa hoi va van tai*.