Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
luong hoai » luong hoa, luong tai, luong khoa
hoai thanh » hoan thanh, oai thanh, hai thanh
thu luong » thu huong, thu tuong, phu luong
mach hoc » cach hoc, dich hoc, anh hoc
sach hoi » sach doi, sach moi, cach thoi
cong hoc » dong hoc, cong hoa, cong coc
lau luan » dau luan, lap luan, khau luan
hoi lau » hoi cau, hoi luu, hoi lang
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: tu ((mach hoc) or (sach hoi)) tap, nghien thu luong hoai thanh cong hoc xa hoi lau luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((mach hoc) OR (sach hoi)) tap, nghien thu luong hoai thanh cong hoc xa hoi lau luan van.
• Adding a wildcard symbol may retrieve word variants: tu ((mach hoc) or (sach hoi)) tap, nghien thu luong hoai thanh cong hoc xa hoi lau luan van*.