Perhaps you should try some spelling variations:
chi khanh » chi nhanh, thi khanh, phi khanh
phong hoc » phong ho, thong hoc, phuong hoa
mach hoc » cach hoc, dich hoc, anh hoc
cuu dong » cuu cong, cuu tong, cuu long
dong chi » dong cho, dong thi, dung chi
phan van » pham van, thanh van, luan van
nhan dan » phan dau, gian dan, nhan tai
su mach » su sach
hoc xa » hoc ma
ha van » hoa van, nha van, va van
xa ha » xa hoa, xa hai, la ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: su mach hoc tap, nghien cuu dong chi khanh phong hoc xa ha van ((phan van) or (nhan dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su mach hoc tap, nghien cuu dong chi khanh phong hoc xa ha van ((phan van) OR (nhan dan)).
• Adding a wildcard symbol may retrieve word variants: su mach hoc tap, nghien cuu dong chi khanh phong hoc xa ha van ((phan van) or (nhan dan))*.