Perhaps you should try some spelling variations:
cac doanh » cac dan, cac dang, van doanh
doanh hoa » doanh khoa, doanh hoan, danh hoa
tap hinh » tap kinh, tap tinh, tai chinh
hinh hoc » sinh hoc, tin hoc, benh hoc
cuu dong » cuu cong, cuu tong, cuu long
dong cac » duong cac, dong bac, dung cac
hoi danh » hop danh, hoc danh, hoi dang
nhan dan » phan dau, gian dan, nhan tai
hoi dan » hoa dan, hoc dan, hoi dap
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: tap hinh hoc tap, nghien cuu dong cac doanh hoa hoc xa ((hoi danh) OR (hoi dan)) nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tap hinh hoc tap, nghien cuu dong cac doanh hoa hoc xa ((hoi danh) OR (hoi dan)) nhan dan".
• Adding a wildcard symbol may retrieve word variants: tap hinh hoc tap, nghien cuu dong cac doanh hoa hoc xa ((hoi danh) OR (hoi dan)) nhan dan*.