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