Perhaps you should try some spelling variations:
khanh phuong » khanh phong, thanh phuong, khanh phung
phuong hoa » huong hoa, phuong hoang, hung hoa
hoc khanh » hoc nhanh, hoc thanh, hoc hanh
luan luan » quan luan, luan luong, luan hoan
sach hoc » cach hoc, sach hoi, mach hoc
su sach » so sach, vu sach
xa khoa » da khoa, bia khoa, tai khoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach hoc tap, nghien ((cuu mo) or (cua cong)) hoc khanh phuong hoa xa khoa luan luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoc tap, nghien ((cuu mo) OR (cua cong)) hoc khanh phuong hoa xa khoa luan luan van.
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien ((cuu mo) or (cua cong)) hoc khanh phuong hoa xa khoa luan luan van*.