Perhaps you should try some spelling variations:
khoan phap » khoan phai, khoa phau, han phap
phap thong » phap phong, phap chong, pho thong
thoi thuoc » phoi thuoc, choi thuc, hoc thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
khau thong » khau thuong, khap thong, khau tong
hoach toi » hoach hoi, hoach toan, hoach do
cach thoi » cac thoi, cach thuc, cach noi
toi tich » doi tich, toi tinh, noi thich
tich cac » tich va, tich bao
sach kho » bach khoa, sach dao, sach nha
kho khau » kho khan, khoa kham, khoa phau
tu cach » tu cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu hoach toi tich cac khoan phap thong ) or ( tu cach thoi thuoc sach kho khau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach toi tich cac khoan phap thong ) OR ( tu cach thoi thuoc sach kho khau thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu hoach toi tich cac khoan phap thong ) or ( tu cach thoi thuoc sach kho khau thong ))*.