Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa tap di snippets" » "khoa tai di snippets", "khoa than di snippets", "hoc tap di snippets", "khoa tap dai snippets", "khoa tap de snippets", "khoa tap ki 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: (((("khoa tap di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa tap di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa tap di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa tap di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.