Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nang quan ve snippets" » "ban quan ve snippets", "nang suat ve snippets", "nang quan he snippets", "nang quan vi snippets", "nang quan va 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: (((("nang quan ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nang quan ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nang quan ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nang quan ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.