Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ho van hong snippets" » "ho van phong snippets", "ho van hoang snippets", "ho van huong snippets", "hoc van hong snippets", "vo van hong snippets", "so 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: (((("ho 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: (((("ho van hong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ho van hong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ho van hong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.