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, mach hoc, sach duoc
sach hoi » sach doi, sach moi, cach thoi
hoc phan » hoc dan, hoc pho
phap van » pham van, phan van, phap han
va phap » va phat, ban phap
mo hoc » mon hoc, co hoc
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) OR (sach hoi)) tap, nghien cuu mo 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) OR (sach hoi)) tap, nghien cuu mo hoc phan khong hoc xa hoi va phap van".
• Adding a wildcard symbol may retrieve word variants: te ((sach hoc) OR (sach hoi)) tap, nghien cuu mo hoc phan khong hoc xa hoi va phap van*.