Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vu khanh du snippets" » "vu thanh du snippets", "van khanh du snippets", "duy khanh du snippets", "vu khach deu snippets", "vu khanh bui snippets", "vu khanh thu 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: (((("vu khanh 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: (((("vu khanh du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vu khanh du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vu khanh du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.