Perhaps you should try some spelling variations:
toan phuong » doan phuong, tran phuong, toan thuong
doanh thong » doanh thuong, doanh tong, doanh trong
phuong tin » phuong tien, thuong tin, phuong trinh
giai doanh » giai doan, trai doanh, lai doanh
thong minh » thong tin, hoang minh
giai toan » giai doan, giai toa, gioi toan
toc sach » hoc sach, doc sach, thuoc sach
sach kha » sach nha, sach ha, sach tham
sach dao » lanh dao
ke giai » kem giai, de giai, ke giao
dao va » dao van, tao va, do va

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( toc sach kha ke giai toan phuong tin ) or ( toc sach dao va giai doanh thong minh ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( toc sach kha ke giai toan phuong tin ) OR ( toc sach dao va giai doanh thong minh )).
• Adding a wildcard symbol may retrieve word variants: (( toc sach kha ke giai toan phuong tin ) or ( toc sach dao va giai doanh thong minh ))*.