Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi tre du snippets" » "khoe tre du snippets", "choi tre du snippets", "khoa tre du snippets", "khoi te du snippets", "khoi tre tu 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: (((("khoi tre 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: (((("khoi tre du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi tre du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi tre du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.