Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"qua du doc snippets" » "qua dau doc snippets", "qua su doc snippets", "qua cu doc snippets", "qua duy doc snippets", "qua du hoc snippets", "qua nu doc 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 du doc 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 du doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qua du doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qua du doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.