Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"do tren cong snippets" » "do trien cong snippets", "do tien cong snippets", "do tran cong snippets", "dong tren cong snippets", "duoc tren cong snippets", "do trung cong 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: (((("do tren cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("do tren cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( do tren cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("do tren cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.