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