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