Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
hoan thanh » hoang thanh, ban thanh, van thanh
thong hoc » thuong hoc, tuong hoc, thong hoa
hoa nhanh » hoc nhanh, hoa thanh, hoa khanh
danh nhan » doanh nhan, thanh nhan, benh nhan
nhan dan » phan dau, gian dan, nhan tai
cac cong » cua cong
hoc danh » hoc dan, hoc anh, hoc hanh
cac toi » cac thoi
toi tap » toi gap, toan tap, tong tap
hoc xa » hoc ma
xa hoc » xa hoi, va hoc, xa hoa

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