Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
hoc doanh » hoa doanh, hoc danh, hoc dan
nhan dan » phan dau, gian dan, nhan tai
cac thu » cach thuc, cac thoi
thu tap » thu thap, thuc tap, thu tai
va nhan » van nhan, ca nhan, va phan
huu mo » huu mot, huu co, huu ho
mo hoc » mon hoc, co hoc

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 doanh ((khoa hoc) OR (hoa hoc)) xa 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 doanh ((khoa hoc) OR (hoa hoc)) xa hoi va nhan dan".
• Adding a wildcard symbol may retrieve word variants: tu cac thu tap, nghien huu mo hoc doanh ((khoa hoc) OR (hoa hoc)) xa hoi va nhan dan*.