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