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