Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
doanh khoa » toan khoa
khoa hoc » hoa hoc
nhan dan » phan dau, gian dan, nhan tai
cac thu » cach thuc, cac thoi
thu tap » thu thap, thuc tap, thu tai
mon hoc » toan hoc, dong hoc
va nhan » van nhan, ca nhan, va phan
mo hoc » co hoc
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: tu cac thu tap, nghien huu ((mo hoc) OR (mon hoc)) doanh khoa hoc ma hoi va nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac thu tap, nghien huu ((mo hoc) OR (mon hoc)) doanh khoa hoc ma hoi va nhan dan".
• Adding a wildcard symbol may retrieve word variants: tu cac thu tap, nghien huu ((mo hoc) OR (mon hoc)) doanh khoa hoc ma hoi va nhan dan*.