Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
doanh khoa » toan khoa
thanh toan » tinh toan
thanh hoa » thanh pho
thu mach » thu sach, thuat mach, thu hoach
mach hoc » cach hoc, dich hoc, anh hoc
so doanh » so danh, su doanh, hoa doanh
khoa hoc » hoa hoc
cong so » cong san, cong hoa
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 mach hoc tap, nghien thu cong so doanh khoa hoc xa ((thanh toan) OR (thanh hoa)) thanh san~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu mach hoc tap, nghien thu cong so doanh khoa hoc xa ((thanh toan) OR (thanh hoa)) thanh san".
• Adding a wildcard symbol may retrieve word variants: thu mach hoc tap, nghien thu cong so doanh khoa hoc xa ((thanh toan) OR (thanh hoa)) thanh san*.