Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc qua dan slippers" » "hoc quan dan slippers", "hoc cua dan slippers", "hoc quy dan slippers", "hoc qua danh slippers", "hoc qua ban slippers", "hoc qua dan slippery", "hoc qua dan grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc qua dan slippers") OR ("python using java snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( hoc qua dan slippers ) or ( python using java snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("hoc qua dan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.