Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"qua khu cong snippets" » "qua thu cong snippets", "qua thi cong snippets", "qua cuu cong snippets", "quan khu cong snippets", "qua kho cong snippets", "cua khu cong 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: (((("qua khu cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("qua khu cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qua khu cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qua khu cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.