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