Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duong che du snippets" » "dong che du snippets", "dung che du snippets", "luong che du snippets", "duong che do snippets", "duong che tu snippets", "duong che duoc 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: (((("python using java snippets") or ("duong che du snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("duong che du snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( duong che du snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("duong che du snippets"))) or ("locating bug code snippets"))*.