Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hao van o snippets" » "dao van o snippets", "ho van o snippets", "cao van o snippets", "hao van do snippets", "hao van ho snippets", "hao van co 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: (((("hao van o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hao van o snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hao van o snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hao van o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.