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