Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc dung don snippets" » "hoc ung don snippets", "hoc dan don snippets", "hoc cong don snippets", "hoc dung dong snippets", "hoc dung doi snippets", "hoc dung dan 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: (((("hoc dung don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc dung don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc dung don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc dung don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.