Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong thi dan slippers" » "duong thi dan slippers", "dang thi dan slippers", "dong tai dan slippers", "dong thi doan slippers", "dong thi lan slippers", "dong thi dai slippers", "dong thi dan slippery", "dong thi 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: (((("dong thi 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: (((("dong thi dan slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong thi dan slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong thi dan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.