Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
sach hoc » cach hoc, sach hoi, mach hoc
san khoa » toan khoa, hang khoa, da khoa
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 san » hoc dan, toc san, hoc can
hoc xa » hoc ma
ho cuu » ho chu, ho cua, so cuu
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 san khoa hoc xa ho cuu ((phan van) OR (thanh van))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghien cuu mon hoc san khoa hoc xa ho cuu ((phan van) OR (thanh van))".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu mon hoc san khoa hoc xa ho cuu ((phan van) OR (thanh van))*.