Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong tu chan snippets" » "dong luc chan snippets", "thong tu chan snippets", "dong tai chan snippets", "dong tu chanh snippets", "dong tu nhan snippets", "dong tu cham 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 tu chan 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 tu chan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong tu chan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong tu chan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.