Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
danh nhan » doanh nhan, thanh nhan, benh nhan
thong hoc » thuong hoc, tuong hoc, thong hoa
nhan dan » phan dau, gian dan, nhan tai
hoa nhan » hoa phan, hoa nhap, hoa nha
hai danh » thai danh, hai anh, hai dang
cach toi » cach thoi, cac toi, cach noi
tu cach » tu cac
hoa han » hoa phan, hoa dan, hoa van
toi tap » toi gap, toan tap, tong tap
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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 ((hoa nhan) or (hoa han)) thong hoc xa hai danh nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach toi tap, nghien cua cong ((hoa nhan) OR (hoa han)) thong hoc xa hai danh nhan dan.
• Adding a wildcard symbol may retrieve word variants: tu cach toi tap, nghien cua cong ((hoa nhan) or (hoa han)) thong hoc xa hai danh nhan dan*.