Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mao van hong snippets" » "mao van phong snippets", "mao van hoang snippets", "mao van huong snippets", "dao van hong snippets", "cao van hong snippets", "hao van hong 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: (((("mao van hong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mao van hong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mao van hong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mao van hong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.