Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"va vinh long snippets" » "va dinh long snippets", "va dinh luong snippets", "va minh luong snippets", "van vinh long snippets", "va kinh long snippets", "va tinh long 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: (((("va vinh long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("va vinh long snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( va vinh long snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("va vinh long snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.