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