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