Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"va phan doc snippets" » "va phan duoc snippets", "va phan duc snippets", "va than doc snippets", "van phan doc snippets", "va phat doc snippets", "va phap doc 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: (((("va phan doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("va phan doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( va phan doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("va phan doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.