Perhaps you should try some spelling variations:
"su sach phap thuat bao khi" » "su sach phau thuat bao khi", "su sach phap luat bao khi", "su sach phap phat bao khi", "su sach phat thuat bao khi", "su sach nha thuat bao khi", "su sach tham thuat bao khi", "su sach phap thuat bai khi", "su sach phap thuat giao khi", "su sach phap thuat do khi", "so sach phap thuat bao khi", "vu sach phap thuat bao khi", "su sach phap thuat bao chi", "su sach phap thuat ban khi", "su sach phap thuat bao kha"
"su sach dao thuat co khi" » "su sach dao phat co khi", "su sach va thuat co khi", "su sach cac thuat co khi", "su lanh dao thuat co khi", "su sach dao thuat do khi", "su sach dao thuat o khi", "so sach dao thuat co khi", "vu sach dao thuat co khi"

Try widening your search to All Fields.

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 phap thuat bao khi") or ("su sach dao thuat co khi"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("su sach phap thuat bao khi") OR ("su sach dao thuat co khi")).
• Removing quotes may allow a broader search: (( su sach phap thuat bao khi ) or ( su sach dao thuat co khi )).
• Adding a wildcard symbol may retrieve word variants: (("su sach phap thuat bao khi") or ("su sach dao thuat co khi"))*.