Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
coc doanh » hoa doanh, cho doanh, voi doanh
cac doanh » cac dan, cac dang, van doanh
cach toi » cach thoi, cac toi, cach noi
khoa hoc » hoa hoc
tu cach » tu cac
toi tap » toi gap, toan tap, tong tap
va phan » van phan, va phat, va phap
phan va » phan van, nhan va, han va
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach toi tap, nghien cua cong ((coc doanh) or (cac doanh)) khoa hoc xa hoi va phan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach toi tap, nghien cua cong ((coc doanh) OR (cac doanh)) khoa hoc xa hoi va phan va.
• Adding a wildcard symbol may retrieve word variants: tu cach toi tap, nghien cua cong ((coc doanh) or (cac doanh)) khoa hoc xa hoi va phan va*.