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