Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"do tren chen snippets" » "do tren chien snippets", "do ren chen snippets", "do tren nen snippets", "dong tren chen snippets", "duoc tren chen snippets", "do trung chen 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 chen 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 chen snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( do tren chen snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("do tren chen snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.