Perhaps you should try some spelling variations:
"vu khach cha de giai co thong minh" » "vu khach cha de giai co hoang minh", "vu thanh cha de giai co thong minh", "vu khanh cha de giai co thong minh", "vu khac cha de giai co thong minh", "vay khach cha de giai co thong minh", "vu khach cha de giai bo thong minh", "vu khach cha de giai co trong minh", "vu khach cha de giai co phong minh", "vu khach cha dan giai co thong minh", "vu khach cha kem giai co thong minh", "vu khach cha de giai cao thong minh", "vu khach cha de gian co thong minh", "vu khach cha de gioi co thong minh", "vu khach cha me giai co thong minh", "vu khach chat deo giai co thong minh", "vu khach cham den giai co thong minh"
"so sach phap ve giao cao thong tin" » "so sach phat ve giao cao thong tin", "so sach nha ve giao cao thong tin", "so sach tham ve giao cao thong tin", "so sach phap ve giao cao thuong tin", "so sach phap ve giao tao thong tin", "so sach phap ve giao cao phong tin", "so sach phap ve giai cao thong tin", "so sach phap ve bao cao thong tin", "so sach phap ve tao cao thong tin", "so sanh phap ve giao cao thong tin", "bo sach phap ve giao cao thong tin", "co sach phap ve giao cao thong tin", "so sach phap va giao cao thong tin", "so sach pha ve giao cao thong tin", "so sach phan ve giao cao thong tin", "so sach phap te giao cao thong tin", "so sach phap viet giao cao thong tin", "so sach phap van giao cao thong tin", "so sach phap ve giao cao thong tinh"

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: (("vu khach cha de giai co thong minh") or ("so sach phap ve giao cao thong tin"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("vu khach cha de giai co thong minh") OR ("so sach phap ve giao cao thong tin")).
• Removing quotes may allow a broader search: (( vu khach cha de giai co thong minh ) or ( so sach phap ve giao cao thong tin )).
• Adding a wildcard symbol may retrieve word variants: (("vu khach cha de giai co thong minh") or ("so sach phap ve giao cao thong tin"))*.