Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"peng tu minh snippets" » "peng su minh snippets", "peng theu minh snippets", "phong tu minh snippets", "peng thu minh snippets", "peng vu minh snippets", "peng thi minh snippets", "peng tu minh 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: (((("peng tu minh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("peng tu minh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( peng tu minh snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("peng tu minh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.