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
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
can thuc » dan thuc, van thuc, cay thuc
cau nhan » chau nhan, ca nhan, cu nhan
nhan va » nhan tai, nhan dan, nhan tao
hoi cau » hoi chu, hoc cau, hoa cau
tai hoi » tai khoi, dai hoi, tai hai
tu can » tu ban, tu cac, thu canh

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

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