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