Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"kieu toan de snippets" » "kiem toan de snippets", "bieu toan de snippets", "hieu toan de snippets", "kieu toan du snippets", "kieu toan ke snippets", "kieu toan ve 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: (((("kieu toan de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("kieu toan de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( kieu toan de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kieu toan de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.