Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hang hau le snippets" » "hoang hau le snippets", "hang dau le snippets", "hang hai le snippets", "hang ha le snippets", "hang hao 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: (((("hang hau 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: (((("hang hau le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hang hau le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang hau le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.