Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhat hieu he snippets" » "nhat chieu he snippets", "nha hieu he snippets", "nhat bieu he snippets", "nhat hieu ve snippets", "nhat hiem he snippets", "nhat hieu le 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: (((("nhat hieu he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhat hieu he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhat hieu he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat hieu he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.