Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
goc nhanh » hoc nhanh, doc nhanh, ngoc khanh
chung hoc » trung hoc, dung hoc, hung hoa
toc sach » hoc sach, doc sach, thuoc sach
sach hoi » sach doi, sach moi, cach thoi
goc nhan » ngoc nhan, goc nhin, hoc nhan
phan van » pham van, thanh van, luan van
va phan » van phan, va phat, va phap
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: toc sach hoi dap, nghien cua mot ((goc nhanh) or (goc nhan)) chung hoc xa hoi va phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach hoi dap, nghien cua mot ((goc nhanh) OR (goc nhan)) chung hoc xa hoi va phan van.
• Adding a wildcard symbol may retrieve word variants: toc sach hoi dap, nghien cua mot ((goc nhanh) or (goc nhan)) chung hoc xa hoi va phan van*.