Perhaps you should try some spelling variations:
phan chong » phan cong, phan hong, phap chong
toc mach » toc sach, hoc mac, tim mach
mach hoc » cach hoc, dich hoc, anh hoc
cuu long » cuu cong, cuu tong, cuu nang
long hoc » dong hoc, long soc, long thuoc
hoc phan » hoc dan, hoc pho
hoi ly » hoi ky, hai ly, hoi le
luan » quan, lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc mach hoc tap, nghien cuu long hoc phan chong ((hoc xa) or (hoc ma)) hoi ly luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc mach hoc tap, nghien cuu long hoc phan chong ((hoc xa) OR (hoc ma)) hoi ly luan van.
• Adding a wildcard symbol may retrieve word variants: toc mach hoc tap, nghien cuu long hoc phan chong ((hoc xa) or (hoc ma)) hoi ly luan van*.