Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nang du tre snippets" » "nang tu tre snippets", "nang luc tre snippets", "nang doc tre snippets", "nang duc tre snippets", "nang du tru snippets", "nang dua tren 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: (((("nang du tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nang du tre snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nang du tre snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nang du tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.