Perhaps you should try some spelling variations:
khong phan » thong phan, khong phai, khong phap
phan thong » phan thuong, phan hong, phan tong
cac khong » cac phong, cat khong, cac phuong
sach dao » lanh dao
khoan le » khoan ke, hon le, khoan va
le thong » le thuong, he thong, le hong
toc sach » hoc sach, doc sach, thuoc sach
tu sach » thu sach, su sach, te sach
dao tuc » dao duc
tuc cac » tu cac, tich cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach dao tuc cac khoan le thong ) or ( toc sach dao tuc cac khong phan thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach dao tuc cac khoan le thong ) OR ( toc sach dao tuc cac khong phan thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach dao tuc cac khoan le thong ) or ( toc sach dao tuc cac khong phan thong ))*.