Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan ve chi snippets" » "phan le chi snippets", "phan va chi snippets", "pha ve chi snippets", "phan ve chim snippets", "phan ke chi snippets", "phan ve cai 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 ve chi 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 ve chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan ve chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan ve chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.