Perhaps you should try some spelling variations:
danh khoa » doanh khoa, anh khoa, danh hoa
van thanh » ban thanh, van tuan
thu mach » thu sach, thuat mach, thu hoach
mach hoc » cach hoc, dich hoc, anh hoc
cong san » cong tac
khoa hoc » hoa hoc
mau thai » mai thai, mau than, mau thay
thai van » thi van, thanh van, thai vung
cong so » cong hoa
hoc mau » hoc ma, hoc may, hoc mac

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 tap, nghien cuu ((cong so) OR (cong san)) danh khoa hoc mau thai van thanh pho~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu mach hoc tap, nghien cuu ((cong so) OR (cong san)) danh khoa hoc mau thai van thanh pho".
• Adding a wildcard symbol may retrieve word variants: thu mach hoc tap, nghien cuu ((cong so) OR (cong san)) danh khoa hoc mau thai van thanh pho*.