Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi dan cach snippets" » "phi dan cac snippets", "phi dan canh snippets", "phi nhan cach snippets", "phi san cach snippets", "phi van cach snippets", "chi dan cach 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: (((("phi dan cach snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phi dan cach snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi dan cach snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi dan cach snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.