Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc co viet slippers" » "hoc so viet slippers", "hoc o viet slippers", "hoc hoc viet slippers", "hoc cao viet slippers", "hoc co viet slippery", "hoc co viet 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 co viet 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 co viet slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc co viet slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc co viet slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.