Perhaps you should try some spelling variations:
hoan thanh » hoang thanh, ban thanh, van thanh
cong hoan » cong hoa, dong hoa, cong san
thanh hoa » thanh pho
dich hoc » sinh hoc, hinh hoc, tinh hoc
cuu cong » cua cong, thu cong, cac cong
phan van » pham van, thanh van, luan van
tu dich » te dich, chu dich, hut dich
hoi dan » hoa dan, hoc dan, hoi dap
nhan va » nhan tai, nhan dan, nhan tao
ma hoi » mai hoi, xa hoi, ma hoa

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

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