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