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