Perhaps you should try some spelling variations:
hoan thanh » hoang thanh, ban thanh, van thanh
dong hoan » dong hoa, cong hoan, dang hoang
thanh hoa » thanh pho
bach hoi » sach hoi, bach hoa, bach khoa
cuu dong » cuu cong, cuu tong, cuu long
nhan dan » phan dau, nhan tai
gian dan » gian lang
hoi tap » hoi dap, hoc tap, hoi tai
hoi dat » hoi dap, hoi dan, hoc dat
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: vu bach hoi tap, nghien cuu dong hoan thanh hoa hoc xa hoi dat ((nhan dan) or (gian dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach hoi tap, nghien cuu dong hoan thanh hoa hoc xa hoi dat ((nhan dan) OR (gian dan)).
• Adding a wildcard symbol may retrieve word variants: vu bach hoi tap, nghien cuu dong hoan thanh hoa hoc xa hoi dat ((nhan dan) or (gian dan))*.