Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tru tinh he snippets" » "trieu tinh he snippets", "cuu tinh he snippets", "tru trinh he snippets", "tru tinh ha snippets", "tru tich he 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: (((("tru tinh 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: (((("tru tinh he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tru tinh he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tru tinh he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.