Perhaps you should try some spelling variations:
doanh khoa » toan khoa
dinh hoc » sinh hoc, tinh hoc, dich hoc
hinh hoc » sinh hoc, tin hoc, benh hoc
cuu long » cuu cong, cuu tong, cuu nang
so doanh » so danh, su doanh, hoa doanh
khoa hoc » hoa hoc
long so » long soc, cong so, dong so
va luan » vay luan, van luan, va quan
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: nam ((dinh hoc) OR (hinh hoc)) tap, nghien cuu long so doanh khoa hoc ma hoi va luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nam ((dinh hoc) OR (hinh hoc)) tap, nghien cuu long so doanh khoa hoc ma hoi va luan van".
• Adding a wildcard symbol may retrieve word variants: nam ((dinh hoc) OR (hinh hoc)) tap, nghien cuu long so doanh khoa hoc ma hoi va luan van*.