Perhaps you should try some spelling variations:
"co sach dao le loi dung phuong dinh" » "co sach dao le loi dung phuong binh", "co sach dao le loi dung phuong linh", "co sach dao le loi dung phuong trinh", "co sach dao le loi dung thuong dinh", "co sach dao le loi bang phuong dinh", "co sach dao le loi dung chung dinh", "co lanh dao le loi dung phuong dinh", "co sach dao le noi dung phuong dinh", "co sach dao le hoi dung phuong dinh", "co sach dao le loi cung phuong dinh", "cuon sach dao le loi dung phuong dinh", "hoc sach dao le loi dung phuong dinh", "co sach do le loi dung phuong dinh", "co sach dao ve loi dung phuong dinh", "co sach hao le loi dung phuong dinh", "co sach dao la loi dung phuong dinh"
"bo sach cua tay nguoi bana phuong minh" » "bo sach cua tay nguoi bang phuong minh", "bo sach cua tay nguoi ban phuong minh", "bo sach cua tay nguoi ban huong minh", "bo sach cua tay nguoi bana phuong binh", "bo sach cua tay nguoi bana phuong linh", "bo sach cua tay nguoi bana phung minh", "bo sach cua tay nguoi benh phuong minh", "bo sach cua tay nguoi san phuong minh", "bo sach cua toc nguoi bana phuong minh", "bo sach cua dao nguoi bana phuong minh", "bo mach cua tay nguoi bana phuong minh", "bo cach cua tay nguoi bana phuong minh", "bo sac cua tay nguoi bana phuong minh", "hoc sach cua tay nguoi bana phuong minh", "bo sach cua cay nguoi bana phuong minh", "bo sach cua tam nguoi bana phuong minh", "bo sach cua tap nguoi bana phuong 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: (("co sach dao le loi dung phuong dinh") or ("bo sach cua tay nguoi bana phuong minh"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("co sach dao le loi dung phuong dinh") OR ("bo sach cua tay nguoi bana phuong minh")).
• Removing quotes may allow a broader search: (( co sach dao le loi dung phuong dinh ) or ( bo sach cua tay nguoi bana phuong minh )).
• Adding a wildcard symbol may retrieve word variants: (("co sach dao le loi dung phuong dinh") or ("bo sach cua tay nguoi bana phuong minh"))*.