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