Perhaps you should try some spelling variations:
hoach giai » hoach giao, hoc giai, doanh giai
doanh khoa » toan khoa
hoc doanh » hoa doanh, hoc danh, hoc dan
giai dap » giai phap, giai doan, gian dan
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
khoa hoc » hoa hoc
nhan van » nhan va, phan van, nha van
nhan dan » phan dau, gian dan, nhan tai
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: thu hoach giai dap, nghien cuu dong hoc doanh khoa hoc ma hoi va ((nhan van) or (nhan dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu hoach giai dap, nghien cuu dong hoc doanh khoa hoc ma hoi va ((nhan van) OR (nhan dan)).
• Adding a wildcard symbol may retrieve word variants: thu hoach giai dap, nghien cuu dong hoc doanh khoa hoc ma hoi va ((nhan van) or (nhan dan))*.