Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xac cua dan slippers" » "tac cua dan slippers", "cac cua dan slippers", "sac cua dan slippers", "xac cua dang slippers", "xac cua ban slippers", "xac ca dan slippers", "xac cua dan slippery", "xac cua dan 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: (((("xac cua dan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("xac cua dan slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xac cua dan slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xac cua dan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.