Perhaps you should try some spelling variations:
pho khong » pho thong, nho khong, phong khong
khong hoc » khung hoc, thong hoc, khong thuoc
cach hoc » cach thuc, cach thoi, dich hoc
bac hoc » bai hoc, bac ho
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va pham » van pham, va phat, va 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 ((bac hoc) or (cach hoc)) tap, nghien cuu mon hoc pho khong hoc xa hoi va pham van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((bac hoc) OR (cach hoc)) tap, nghien cuu mon hoc pho khong hoc xa hoi va pham van.
• Adding a wildcard symbol may retrieve word variants: te ((bac hoc) or (cach hoc)) tap, nghien cuu mon hoc pho khong hoc xa hoi va pham van*.