Perhaps you should try some spelling variations:
phan trung » phan truong, pham trung, phan trong
nghien cac » nghiep cach, nghien cuu, nghiep cay
trung hoc » trung quoc
phan van » pham van, thanh van, luan van
hoc phan » hoc dan, hoc pho
mai khoi » mai khoa, tai khoa, cac khoi
dong hoc » dong co, dong luc
cac dong » cac duong, cac cong, cac dang
thu minh » thi minh, chi minh, vu minh
hoc mai » hoc ma, hoc dai, hoc bai
khoi va » hoi va, khi va, choi va
va phan » van phan, va phat, va phap
tu manh » tu minh, tu hanh, vu manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu manh) or (thu minh)) hoc tap, nghien cac dong hoc phan trung hoc mai khoi va phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu manh) OR (thu minh)) hoc tap, nghien cac dong hoc phan trung hoc mai khoi va phan van.
• Adding a wildcard symbol may retrieve word variants: ((tu manh) or (thu minh)) hoc tap, nghien cac dong hoc phan trung hoc mai khoi va phan van*.