Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khao dat cua snippets" » "khao sat cua snippets", "khao danh cua snippets", "chap dat cua snippets", "khao dai cua snippets", "khao day cua snippets", "khao mat cua 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: (((("khao dat cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khao dat cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khao dat cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khao dat cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.