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