Perhaps you should try some spelling variations:
hoc nhanh » hoc nganh, hoc phan
nhanh hoa » nhanh hoan, thanh hoa, khanh hoa
danh nhan » doanh nhan, thanh nhan, dung nhan
sach doi » sach hoi, sach moi, sach dao
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
tu sach » thu sach, su sach, te sach
doi tap » doi tac, doi dap, doi tai
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 sach doi tap, nghien cuu cong hoc nhanh hoa hoc xa hoi ((danh nhan) OR (benh nhan)) tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach doi tap, nghien cuu cong hoc nhanh hoa hoc xa hoi ((danh nhan) OR (benh nhan)) tai".
• Adding a wildcard symbol may retrieve word variants: tu sach doi tap, nghien cuu cong hoc nhanh hoa hoc xa hoi ((danh nhan) OR (benh nhan)) tai*.