Perhaps you should try some spelling variations:
hoi doanh » hoa doanh, voi doanh, doi doanh
nhan van » nhan dan, nhan va, phan van
vu sach » vu bach, su sach, vu khach
hoi tap » hoc tap, hoi tai, hai tap
hoc tan » hoc tang, hoc dan, hoc tap
tan hoa » van hoa, tap hoa, tan ha
mo hoc » mon hoc, co hoc
hoc xa » hoc ma

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((hoi tap) OR (hoi dap)), nghien cuu mo hoc tan hoa hoc xa hoi doanh nhan van~".
• Adding a wildcard symbol may retrieve word variants: vu sach ((hoi tap) OR (hoi dap)), nghien cuu mo hoc tan hoa hoc xa hoi doanh nhan van*.