Perhaps you should try some spelling variations:
hoc thanh » hoc nhanh, hoan thanh, hoc phan
thanh hoa » thanh pho
mach hoc » cach hoc, anh hoc, bac hoc
dich hoc » sinh hoc, hinh hoc, tinh hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
van phan » van phong, van thanh, luan phan
phan dau » phan tu, hang dau
hoa van » hoa dan, hoang van, hoa phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((mach hoc) OR (dich hoc)) tap, nghien cuu dong hoc thanh hoa hoc ma hoa van phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((mach hoc) OR (dich hoc)) tap, nghien cuu dong hoc thanh hoa hoc ma hoa van phan dau".
• Adding a wildcard symbol may retrieve word variants: thu ((mach hoc) OR (dich hoc)) tap, nghien cuu dong hoc thanh hoa hoc ma hoa van phan dau*.