Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngan sach ca snippets" » "ngan sach cap snippets", "ngan sach cua snippets", "ngan sach xa snippets", "nganh sach ca snippets", "nhan sach ca snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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: (((("ngan sach ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngan sach ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngan sach ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngan sach ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.