Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
phan chung » phan cung, phan hung, phan thuong
huu tuong » huu tung, cuu tuong, huu thong
tuong hoc » truong hoc, tuong ho, duong hoc
chung hoc » trung hoc, dung hoc, hung hoa
toc cach » hoc cach, toc sach, truoc cach
cach hoc » cach thuc, cach thoi, dich hoc
hoc phan » hoc dan, hoc pho
van phan » van phong, van thanh, luan phan
va phan » va phat, va phap, hoa phan
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 cach hoc tap, nghien huu tuong hoc phan chung hoc xa hoi ((va phan) OR (van phan)) van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc cach hoc tap, nghien huu tuong hoc phan chung hoc xa hoi ((va phan) OR (van phan)) van".
• Adding a wildcard symbol may retrieve word variants: toc cach hoc tap, nghien huu tuong hoc phan chung hoc xa hoi ((va phan) OR (van phan)) van*.