Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc can loi snippets" » "hoc dan loi snippets", "hoc cao loi snippets", "hoc cac loi snippets", "hoc van loi snippets", "hoc can moi snippets", "hoc hang loi 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 can loi 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 can loi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc can loi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc can loi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.