Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chung van ke snippets" » "phung van ke snippets", "nhung van ke snippets", "chung han ke snippets", "chung van ket snippets", "chung van de snippets", "chung van ky 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: (((("chung van ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chung van ke snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chung van ke snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chung van ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.