Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung khoa a7 slippers" » "dung cho a7 slippers", "dung khoa 17 slippers", "dung khoa cam slippers", "dung khoa tai slippers", "dung khoa a7 slippery", "dung khoa a7 grippers"
"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: (((("dung khoa a7 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung khoa a7 slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung khoa a7 slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung khoa a7 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.