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