Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van du chat snippets" » "van duoc chat snippets", "van dung chat snippets", "van doc chat snippets", "van duy chat snippets", "van dau chat snippets", "van de 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: (((("van du 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: (((("van du chat snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van du chat snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van du chat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.