Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc den coi snippets" » "hoc dan coi snippets", "hoc de coi snippets", "hoc hien coi snippets", "hoc den voi snippets", "hoc den cong 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: (((("hoc den coi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc den coi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc den coi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc den coi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.