Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vang de cac snippets" » "van de cac snippets", "hoang de cac snippets", "vang den cac snippets", "vang ve cac snippets", "vang de cai 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: (((("vang de cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vang de cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vang de cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vang de cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.