Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"so tranh 02 snippets" » "co tranh 02 snippets", "bo tranh 02 snippets", "so trang 02 snippets", "so tra 02 snippets", "so tranh 30 snippets", "so tranh co snippets", "so tranh 02 slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("so tranh 02 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("so tranh 02 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( so tranh 02 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("so tranh 02 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.