Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khau van du snippets" » "chau van du snippets", "khau dan du snippets", "khao van du snippets", "khau van duy snippets", "khau van dau snippets", "khau van de 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: (((("khau van du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khau van du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khau van du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khau van du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.