Perhaps you should try some spelling variations:
hoc khanh » hoc nhanh, hoc thanh, hoc hanh
khanh hoa » thanh hoa, hang hoa
tang luan » dung luan
hop tang » hop thang, hoc tang, hop mang
su sach » vu sach
so sach » so sanh, bo sach, co sach
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
ma hop » mau hop, ma hoa, va hop

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) or (so sach)) hoc tap, nghien cuu mot hoc khanh hoa hoc ma hop tang luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) hoc tap, nghien cuu mot hoc khanh hoa hoc ma hop tang luan van.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) hoc tap, nghien cuu mot hoc khanh hoa hoc ma hop tang luan van*.