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