Perhaps you should try some spelling variations:
"tu sach cha me giai nam chuong trinh" » "tu sach cha me giai nam cong trinh", "tu sach cha me giai nam phuong trinh", "tu sach cha me giai nam cuong trinh", "tu sach cha me giai pham chuong trinh", "tu sach nha me giai nam chuong trinh", "tu sach che me giai nam chuong trinh", "tu sach ha me giai nam chuong trinh", "tu sach cha me giai nan chuong trinh", "tu sach cha me gian nam chuong trinh", "tu sach cha me hai nam chuong trinh", "thu sach cha me giai nam chuong trinh", "te sach cha me giai nam chuong trinh", "tu cach cha me giai nam chuong trinh", "tu sach cha de giai nam chuong trinh", "tu sach cha ve giai nam chuong trinh", "tu sach cha ke giai nam chuong trinh"
"su sach phat deo giai bai thong minh" » "su sach phat deo giai bai thong tin", "su sach phat deo giai bai hoang minh", "su sach nha deo giai bai thong minh", "su sach tham deo giai bai thong minh", "su cach pha deo giai bai thong minh", "su sach phat deo giai bai trong minh", "su sach phat deo giai ban thong minh", "su sach phat deo giai tai thuong minh", "su sach chat deo giai bai thong minh", "su sach phat dien giai bai thong minh", "su sach nhat de giai bai thong minh", "su sach phat de giai bai thong minh", "su sach phat so giai bai thong minh", "su sach phat deo gia ba thong minh", "so sach phat deo giai bai thong minh", "vu sach phat deo giai bai thong minh"

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: (("tu sach cha me giai nam chuong trinh") or ("su sach phat deo giai bai thong minh"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("tu sach cha me giai nam chuong trinh") OR ("su sach phat deo giai bai thong minh")).
• Removing quotes may allow a broader search: (( tu sach cha me giai nam chuong trinh ) or ( su sach phat deo giai bai thong minh )).
• Adding a wildcard symbol may retrieve word variants: (("tu sach cha me giai nam chuong trinh") or ("su sach phat deo giai bai thong minh"))*.