Perhaps you should try some spelling variations:
hoc thanh » hoc nhanh, hoan thanh, hoc phan
van thanh » ban thanh, van tuan
thanh dan » thanh san, thanh van, thanh dat
dich hoc » sinh hoc, hinh hoc, tinh hoc
cong hoc » dong hoc, cong hoa, cong ho
cong coc » cong cuoc, cong cac, cong co
ve dich » va dich, van dich
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoi van » hoi va, hoi dan, hai van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ve dich hoc tap, nghien cuu mon hoc thanh ((cong hoc) or (cong coc)) xa hoi van thanh dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ve dich hoc tap, nghien cuu mon hoc thanh ((cong hoc) OR (cong coc)) xa hoi van thanh dan.
• Adding a wildcard symbol may retrieve word variants: ve dich hoc tap, nghien cuu mon hoc thanh ((cong hoc) or (cong coc)) xa hoi van thanh dan*.