Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"con trong co snippets" » "cong trong co snippets", "chon trong co snippets", "con truong co snippets", "con trong ca snippets", "con trong cong snippets", "con trong cuoc 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: (((("con trong co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("con trong co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( con trong co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("con trong co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.