Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tam van cong snippets" » "tam van dong snippets", "tam van phong snippets", "tam phan cong snippets", "nam van cong snippets", "dam van cong snippets", "tom 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: (((("tam 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: (((("tam van cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tam van cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tam van cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.