Perhaps you should try some spelling variations:
doanh khoa » toan khoa
van doanh » toan doanh, van dong, van thanh
khoa hoc » hoa hoc
phat van » pham van, phan van, phap van
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach
moi dap » hoi dap, doi dap, moi dan
cuu mot » cua mot, cuu mo, huu mot
mot van » mot vai, moi van, mot lan
hoa va » hoa van, hoa xa, hoa vo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) OR (bo sach)) moi dap, nghien cuu mot van doanh khoa hoc ma hoa va phat van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (bo sach)) moi dap, nghien cuu mot van doanh khoa hoc ma hoa va phat van*".