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