Perhaps you should try some spelling variations:
tuan pham » thanh pham, san pham, tac pham
sach hoc » sach hoi, mach hoc, sach duoc
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
phan hoa » phan loai, phan phoi, phan hong
hoi tuan » hoi luan, hoi thanh, khai tuan
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 hoc) or (cach hoc)) tap, nghien cuu dong hoc phan hoa hoc xa hoi tuan pham van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach hoc) OR (cach hoc)) tap, nghien cuu dong hoc phan hoa hoc xa hoi tuan pham van.
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoc) or (cach hoc)) tap, nghien cuu dong hoc phan hoa hoc xa hoi tuan pham van*.