Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luong va a1 slippers" » "dung va a1 slippers", "luong va am slippers", "luong va 11 slippers", "luong va a1 slippery", "luong va a1 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: (((("luong va a1 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luong va a1 slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luong va a1 slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong va a1 slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.