Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duong ma che snippets" » "duong va che snippets", "cuong ma che snippets", "duong manh che snippets", "duong may che snippets", "duong ba 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 ma 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 ma che snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong ma che snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong ma che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.