Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc dan dau slippers" » "hoc danh dau slippers", "hoc doan dau slippers", "hoc van dau slippers", "hoc dan dau slippery", "hoc dan dau 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: (((("hoc dan dau slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc dan dau slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc dan dau slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc dan dau slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.