Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chung do toi snippets" » "chung co toi snippets", "chung o toi snippets", "nhung don toi snippets", "chung do thoi snippets", "chung doi toi snippets", "chung do thi 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 do toi 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 do toi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chung do toi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chung do toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.