Perhaps you should try some spelling variations:
hoa doanh » hoa dan
cho thanh » cho phan, tro thanh, cuu thanh
thanh van » thanh san, thanh toan, thanh phan
sach hoi » sach doi, sach moi, cach thoi
cuu cong » cua cong, thu cong, cac cong
khoa hoc » hoa hoc
te sach » toc sach
hoi tap » hoi dap, hoc tap, hoi tai
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
hoi cho » hoi chu, hoi co, hoc cho
toan » tran

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach hoi tap, nghien cuu cong ((hoa doanh) OR (toan doanh)) khoa hoc mai hoi cho thanh van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach hoi tap, nghien cuu cong ((hoa doanh) OR (toan doanh)) khoa hoc mai hoi cho thanh van".
• Adding a wildcard symbol may retrieve word variants: te sach hoi tap, nghien cuu cong ((hoa doanh) OR (toan doanh)) khoa hoc mai hoi cho thanh van*.