Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
coc doanh » cac doanh, cho doanh, voi doanh
hoa doanh » toan doanh, hoa dan
song nho » song nhu, cong nho, dong nho
khoa hoc » hoa hoc
dap phan » dam phan, dap phap, cap phan
phan van » pham van, thanh van, luan van
nho tai » nhan tai, nuoc 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: thuat song nho tai, nghien cua cong ((coc doanh) OR (hoa doanh)) khoa hoc xa hoi dap phan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat song nho tai, nghien cua cong ((coc doanh) OR (hoa doanh)) khoa hoc xa hoi dap phan van".
• Adding a wildcard symbol may retrieve word variants: thuat song nho tai, nghien cua cong ((coc doanh) OR (hoa doanh)) khoa hoc xa hoi dap phan van*.