Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phap dich so snippets" » "phan dich so snippets", "phap dinh so snippets", "phap sinh so snippets", "phap tich so snippets", "phap dich ho 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: (((("phap dich 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: (((("phap dich so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap dich so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap dich so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.