Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
danh nhan » doanh nhan, thanh nhan, benh nhan
sanh doi » sach doi, thanh doi, tinh doi
van nhan » van phan, van thanh, van khanh
khoa hoc » hoa hoc
tan khoa » toan khoa, tran khoa, san khoa
hoc tan » hoc tang, hoc dan, hoc tap
van hoc » van hoa
cua van » cua ban, cua vat, cua dan
doi tap » doi tac, doi dap, doi tai
so sanh » do sanh
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: so sanh doi tap, nghien cua van hoc tan khoa hoc xa hoi ((van nhan) or (danh nhan)) tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh doi tap, nghien cua van hoc tan khoa hoc xa hoi ((van nhan) OR (danh nhan)) tai.
• Adding a wildcard symbol may retrieve word variants: so sanh doi tap, nghien cua van hoc tan khoa hoc xa hoi ((van nhan) or (danh nhan)) tai*.