Perhaps you should try some spelling variations:
nganh dang » ngan hang, nganh cong, ngan danh
thuc thai » thuc pham, toc thai, thuc thuc
nhan dang » nhan dan, phan dang, tran dang
thuoc tai » nuoc tai, hoc tai, thuoc ma
cac thuc » cach thuc, cac thu, can thuc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
tai khoi » tai khoa, mai khoi, tao khoi
khoi cau » hoi cau, khoi can, khoi dau
cau nhan » chau nhan, ca nhan, cu nhan
nhan va » nhan tai, nhan dan, nhan tao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac thuc thai, nghien cuu cong hoc ((nganh dang) or (nhan dang)) thuoc tai khoi cau nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac thuc thai, nghien cuu cong hoc ((nganh dang) OR (nhan dang)) thuoc tai khoi cau nhan va*.