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