Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu tri con snippets" » "dieu tri con snippets", "sieu tri con snippets", "hieu triet con snippets", "hieu tri cong snippets", "hieu tri co snippets", "hieu tri von 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 tri con 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 tri con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu tri con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu tri con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.