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