Perhaps you should try some spelling variations:
khoan khau » khoanh khac, khoa kham, khoa phau
khau thong » khau thuong, khap thong, khau tong
doanh tong » doanh trong, doanh thuong, anh tong
sach tran » sach tranh, sach tren, vach tran
tran thuy » thanh thuy, tran thi, tran huu
tong duoc » trong duoc, dong duoc, tong quoc
pho thong » he thong
thuy cac » thuyet cac, thuc cach, thuy canh
duoc cac » cuoc cach, duoc chat, duong cac
cac khoi » cac thoi, cach thoi, hoc khoi
khoi pho » khoi tho, khoi khoa, hoc pho
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach tran thuy cac khoan khau thong ) or ( luat doanh tong duoc cac khoi pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tran thuy cac khoan khau thong ) OR ( luat doanh tong duoc cac khoi pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach tran thuy cac khoan khau thong ) or ( luat doanh tong duoc cac khoi pho thong ))*.