Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cham xa dong snippets" » "cham va dong snippets", "pham xay dong snippets", "cham mat dong snippets", "cham ha dong snippets", "cham van dong snippets", "cham lao dong 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: (((("cham xa dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cham xa dong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cham xa dong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cham xa dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.