Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cac hieu le snippets" » "cac chieu le snippets", "cao hieu le snippets", "cac kieu le snippets", "cac hieu ve snippets", "cac hieu he snippets", "cac 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: (((("cac 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: (((("cac hieu le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cac hieu le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac hieu le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.