Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc dung son snippets" » "hoc ung son snippets", "hoc dan son snippets", "hoc cong son snippets", "hoc dung san snippets", "hoc dong son snippets", "hoc dung so 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 dung son 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 dung son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc dung son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc dung son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.