Perhaps you should try some spelling variations:
phan khong » phan hong, nhan khong, pham khong
khong hoc » khung hoc, thong hoc, khong thuoc
sach hoc » cach hoc, sach hoi, mach hoc
toan hoc » toan khoa, van hoc, hoa hoc
phap van » pham van, phan van, phap han
te sach » toc sach
mon hoc » dong hoc
va phap » va phat, ban phap
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) OR (toan hoc)) phan khong hoc xa hoi va phap van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach hoc tap, nghien cuu ((mon hoc) OR (toan hoc)) phan khong hoc xa hoi va phap van".
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien cuu ((mon hoc) OR (toan hoc)) phan khong hoc xa hoi va phap van*.