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