Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thac van cua snippets" » "thai van cua snippets", "thao van cua snippets", "thuc van cua snippets", "thac vang cua snippets", "thac ban cua snippets", "thac 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: (((("thac 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: (((("thac van cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thac van cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thac van cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.