Perhaps you should try some spelling variations:
khoan phan » khoan phai, khoan thanh, hoa phan
khan thong » khap thong, khau thong, nhan thong
phan cong » thanh cong
sach nham » sach nha, sach tham, sach han
nham thuc » nhan thuc, nam thuc, nham thu
sach dao » lanh dao
dao thuc » dan thuc, dao tuc, do thuc
thuc cac » thuc cach, tuc cac, phuc cac
thuc anh » thuc hanh, thuy anh, thu anh
kho khan » khoa kham, khoa than
te sach » toc sach
anh kho » anh khoa, anh tho, anh cho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach dao thuc cac khoan phan cong ) OR ( te sach nham thuc anh kho khan thong ))~.
• Adding a wildcard symbol may retrieve word variants: (( te sach dao thuc cac khoan phan cong ) or ( te sach nham thuc anh kho khan thong ))*.