Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hai van cher snippets" » "hai tan cher snippets", "hai van chien snippets", "hai van chat snippets", "thai van cher snippets", "ha van cher 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 cher 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 cher snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hai van cher snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hai van cher snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.