Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duy sang ca snippets" » "duy van ca snippets", "duy can ca snippets", "duy anh ca snippets", "duy sang cua snippets", "duy hang ca snippets", "duy sang ma 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: (((("duy sang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duy sang ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duy sang ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duy sang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.