Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dem hoi du snippets" » "dem toi du snippets", "dep hoi du snippets", "dam choi du snippets", "dem hoi tu snippets", "dem hoi cu 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: (((("dem hoi du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dem hoi du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dem hoi du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dem hoi du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.