Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc ton chat snippets" » "duc don chat snippets", "duc tinh chat snippets", "duc cong chat snippets", "duc tan chat 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: (((("duc ton chat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc ton chat snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc ton chat snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc ton chat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.