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