Perhaps you should try some spelling variations:
sach hoc » cach hoc, sach hoi, mach hoc
dan khoa » dang khoa, san khoa, van khoa
cuu luan » cu luan, cuu luat, cuu van
te sach » toc sach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoi cuu » hoi chu, hoi cua, ho cuu
hoc xa » hoc ma

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 tap, nghien cuu mon hoc ((dan khoa) or (da khoa)) hoc xa hoi cuu luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach hoc tap, nghien cuu mon hoc ((dan khoa) OR (da khoa)) hoc xa hoi cuu luan van.
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien cuu mon hoc ((dan khoa) or (da khoa)) hoc xa hoi cuu luan van*.