Perhaps you should try some spelling variations:
doanh tong » doanh trong, doanh thuong, anh tong
van doanh » toan doanh, van dong, van thanh
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
tong cua » thong cua, trong cua, tuong cua
cac toc » cac toi, cac nuoc, cac thoi
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
cac tu » cac thu, cach tu, cac du
x hoi » xa hoi, o hoi, x ho

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 ky) OR (sach ty)) nang x hoi. hieu van ((cac tu) or (cac toc)) van doanh tong cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach ty)) nang x hoi. hieu van ((cac tu) OR (cac toc)) van doanh tong cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sach ty)) nang x hoi. hieu van ((cac tu) or (cac toc)) van doanh tong cua viet*".