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