Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu vinh le snippets" » "hieu binh le snippets", "hieu kinh le snippets", "chieu tinh le snippets", "hieu dinh le snippets", "hieu vinh v.le snippets", "hieu thinh le 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: (((("hieu vinh 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: (((("hieu vinh le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu vinh le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu vinh le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.