Perhaps you should try some spelling variations:
pham thuong » phan thuong, pham hong
thuong hoc » truong hoc, tuong hoc, thuong ho
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 pham » hoc phan, hoc phat, hoc phap
dai khoi » dai hoi, dai khoa, mai khoi
nhan dan » phan dau, gian dan, nhan tai
hoc dai » hoc dan
khoi va » hoi va, khi va, choi va
va nhan » van nhan, ca nhan, va phan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach hoc) OR (cach hoc)) tap, nghien cuu dong hoc pham thuong hoc dai khoi va nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach hoc) OR (cach hoc)) tap, nghien cuu dong hoc pham thuong hoc dai khoi va nhan dan".
• Adding a wildcard symbol may retrieve word variants: te ((sach hoc) OR (cach hoc)) tap, nghien cuu dong hoc pham thuong hoc dai khoi va nhan dan*.