Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tap quan son snippets" » "tac quan son snippets", "hai quan son snippets", "tap quan so snippets", "tap xuan son snippets", "tap quan doan 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: (((("tap quan son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tap quan son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tap quan son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tap quan son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.