Perhaps you should try some spelling variations:
phan thuong » hang thuong, phan xuong
khoan phan » khoan phai, khoan thanh, hoa phan
phap thong » phap phong, phap chong, pho thong
cach khoa » bach khoa, cac khoa, anh khoa
khoa phap » khoa phau, khoan phai, khong phap
toc sach » hoc sach, doc sach, thuoc sach
sach dao » lanh dao
dao thuc » dan thuc, dao tuc, do thuc
thuc cac » thuc cach, tuc cac, phuc cac
sach tri » sach tai, sach tren, sach bai
ve cach » va cach, ve cac, ve canh
tri ve » tri va, tri le, trinh ve

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 dao thuc cac khoan phan thuong ) or ( te sach tri ve cach khoa phap thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( toc sach dao thuc cac khoan phan thuong ) OR ( te sach tri ve cach khoa phap thong )).
• Adding a wildcard symbol may retrieve word variants: (( toc sach dao thuc cac khoan phan thuong ) or ( te sach tri ve cach khoa phap thong ))*.