Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngu thoi chi snippets" » "ngu thai chi snippets", "nghi thoi chi snippets", "ngu hoc chi snippets", "ngu thon chi snippets", "ngu thong chi 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: (((("ngu thoi chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngu thoi chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngu thoi chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngu thoi chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.