Perhaps you should try some spelling variations:
doanh khoa » toan khoa
hoc doanh » hoa doanh, hoc danh, hoc dan
khoa hoc » hoa hoc
chon cac » cho cac, thong cac, hoc cac
hop tap » hoc tap, hop tac, hop tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoa cac » hoa chat
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: tu cac hop tap, nghien cuu mon hoc doanh khoa hoc xa ((hoa cac) OR (chon cac)) luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac hop tap, nghien cuu mon hoc doanh khoa hoc xa ((hoa cac) OR (chon cac)) luan van".
• Adding a wildcard symbol may retrieve word variants: tu cac hop tap, nghien cuu mon hoc doanh khoa hoc xa ((hoa cac) OR (chon cac)) luan van*.