Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quoc so deu snippets" » "quoc son deu snippets", "nuoc so deu snippets", "quoc co deu snippets", "quoc so dieu snippets", "quoc so du 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: (((("quoc so deu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("quoc so deu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quoc so deu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quoc so deu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.