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