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