Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
sach hoc » cach hoc, sach hoi, mach hoc
khoa hoc » hoa hoc
phan van » pham van, luan van, tran van
tu sach » thu sach, su sach, te sach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoc da » hoc dan, hoc dai, hoc dat
hoc xa » hoc ma
ho chu » hoi chu, cho chu, ho chua
xa ho » xa hoi, xa hoa, xa hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach hoc tap, nghien cuu mon hoc da khoa hoc xa ho chu ((phan van) or (thanh van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu mon hoc da khoa hoc xa ho chu ((phan van) OR (thanh van)).
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu mon hoc da khoa hoc xa ho chu ((phan van) or (thanh van))*.