Perhaps you should try some spelling variations:
khoa doanh » hoa doanh, cho doanh, khoa dang
doanh hoa » doanh khoa, doanh hoan, danh hoa
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
cuu hoan » luu hoang, cuu van, cau hoa
nhan dan » phan dau, gian dan, nhan tai
va nhan » van nhan, ca nhan, va phan
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: thu sach hoc tap, nghien ((cuu hoan) OR (cuu khoa)) khoa doanh hoa hoc xa hoi va nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach hoc tap, nghien ((cuu hoan) OR (cuu khoa)) khoa doanh hoa hoc xa hoi va nhan dan".
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghien ((cuu hoan) OR (cuu khoa)) khoa doanh hoa hoc xa hoi va nhan dan*.