Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tre tinh doi snippets" » "tru tinh doi snippets", "tue tinh doi snippets", "tri tinh doi snippets", "tre trinh doc snippets", "tre trinh do snippets", "tre tinh hoc 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: (((("tre tinh doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tre tinh doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tre tinh doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tre tinh doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.