Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
hoan thanh » hoang thanh, ban thanh, van thanh
mach hoc » cach hoc, anh hoc, bac hoc
dich hoc » sinh hoc, hinh hoc, tinh hoc
mot hoan » moc hoang, mot doanh, hop hoan
cong hoc » dong hoc, cong hoa, cong coc
nhan van » nhan dan, nhan va, phan van
huu mot » cuu mot, huy mot, hieu mot
hoc xa » hoc ma
hoi ca » hoi cua, hoi cac, hoi cau

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 (dich hoc)) tap, nghien huu mot hoan thanh cong hoc xa hoi ca nhan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((mach hoc) OR (dich hoc)) tap, nghien huu mot hoan thanh cong hoc xa hoi ca nhan van".
• Adding a wildcard symbol may retrieve word variants: tu ((mach hoc) OR (dich hoc)) tap, nghien huu mot hoan thanh cong hoc xa hoi ca nhan van*.