Perhaps you should try some spelling variations:
danh nhan » doanh nhan, thanh nhan, benh nhan
sanh hoc » sinh hoc, anh hoc, danh hoc
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong hoc
van nhan » van phan, van thanh, van khanh
so sanh » do sanh
dan hoa » danh hoa, dan hoat, dan khoa

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 hoc tap, nghien cuu tong hoc dan hoa hoc ma hoa ((van nhan) OR (danh nhan)) dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh hoc tap, nghien cuu tong hoc dan hoa hoc ma hoa ((van nhan) OR (danh nhan)) dan".
• Adding a wildcard symbol may retrieve word variants: so sanh hoc tap, nghien cuu tong hoc dan hoa hoc ma hoa ((van nhan) OR (danh nhan)) dan*.