Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tin hieu he snippets" » "tim hieu he snippets", "van hieu he snippets", "tin hieu ve snippets", "tin hiem he snippets", "tin 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: (((("tin 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: (((("tin hieu he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tin hieu he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tin hieu he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.