Perhaps you should try some spelling variations:
voi doanh » von doanh, tri doanh, hoa doanh
hoc toan » hoc tan, hop toan, hoa toan
khoa hoc » hoa hoc
nhan van » nhan dan, nhan va, phan van
vu sach » vu bach, su sach, vu khach
hoi tap » hoc tap, hoi tai, hai tap
mo hoc » mon hoc, co hoc
hoc xa » hoc ma
xa voi » xa hoi, ba voi, da voi

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((hoi tap) OR (hoi dap)), nghien cuu mo hoc toan khoa hoc xa voi doanh nhan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((hoi tap) OR (hoi dap)), nghien cuu mo hoc toan khoa hoc xa voi doanh nhan van".
• Adding a wildcard symbol may retrieve word variants: vu sach ((hoi tap) OR (hoi dap)), nghien cuu mo hoc toan khoa hoc xa voi doanh nhan van*.