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