Perhaps you should try some spelling variations:
thanh hoan » thanh hoang, thanh toan, nhanh hoan
thanh hoa » thanh pho
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
dac nhan » cac nhan, danh nhan, ca nhan
nhan dan » phan dau, gian dan, nhan tai
vu sach » vu bach, su sach, vu khach
hoi dac » hoi dap, hoi dan, hoi 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 sach hoc tap, nghien cuu dong hoc ((thanh hoa) or (thanh hoan)) hoc xa hoi dac nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach hoc tap, nghien cuu dong hoc ((thanh hoa) OR (thanh hoan)) hoc xa hoi dac nhan dan.
• Adding a wildcard symbol may retrieve word variants: vu sach hoc tap, nghien cuu dong hoc ((thanh hoa) or (thanh hoan)) hoc xa hoi dac nhan dan*.