Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
nhan thong » nha thong, nhan khong, nhan tong
nhan trong » nhuan trong, nhat trong, nhin trong
hai doanh » lai doanh, nhap doanh, trai doanh
sach doi » sach hoi, sach moi, sach dao
cong hoc » dong hoc, cong hoa, cong coc
nhan van » nhan dan, nhan va, phan van
su sach » so sach, vu sach
doi tap » doi tac, doi dap, doi tai
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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 doi tap, nghien cua cong hoc ((nhan thong) OR (nhan trong)) hoc xa hai doanh nhan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach doi tap, nghien cua cong hoc ((nhan thong) OR (nhan trong)) hoc xa hai doanh nhan van".
• Adding a wildcard symbol may retrieve word variants: su sach doi tap, nghien cua cong hoc ((nhan thong) OR (nhan trong)) hoc xa hai doanh nhan van*.