Perhaps you should try some spelling variations:
phan chong » phan cong, phan hong, phap chong
sach duoc » sach nuoc, sach dao, sach dung
chong hoc » chung hoc, chong doc, thong hoc
cach hoc » cach thuc, cach thoi, dich hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
hoc phan » hoc dan, hoc pho
nhan dan » phan dau, gian dan, nhan tai
va nhan » van nhan, ca nhan, va 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: tu ((sach duoc) or (cach hoc)) tap, nghien cuu dong hoc phan chong hoc xa hoi va nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach duoc) OR (cach hoc)) tap, nghien cuu dong hoc phan chong hoc xa hoi va nhan dan.
• Adding a wildcard symbol may retrieve word variants: tu ((sach duoc) or (cach hoc)) tap, nghien cuu dong hoc phan chong hoc xa hoi va nhan dan*.