Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phien nam so snippets" » "hien nay so snippets", "phien ban so snippets", "vien nam so snippets", "phien nam sao snippets", "phien nam bo 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: (((("phien nam so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phien nam so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phien nam so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phien nam so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.