Perhaps you should try some spelling variations:
cau doanh » cac doanh, cau danh, cao doanh
doanh hoa » doanh khoa, doanh hoan, danh hoa
cuu cong » cua cong, thu cong, cac cong
cong cau » cong cu, cong chuc, thong cau
dan nhan » danh nhan, dan chan, van nhan
su sach » vu sach
so sach » so sanh, bo sach, co sach
hoi dan » hoa dan, hoc dan, hoi dap
nhan va » nhan tai, nhan dan, nhan tao
hoc xa » hoc ma

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) hoc tap, nghien cuu cong cau doanh hoa hoc xa hoi dan nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) hoc tap, nghien cuu cong cau doanh hoa hoc xa hoi dan nhan va.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) hoc tap, nghien cuu cong cau doanh hoa hoc xa hoi dan nhan va*.