Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dna hanh cua snippets" » "da hanh cua snippets", "na hanh cua snippets", "dang hanh cua snippets", "dna manh cua snippets", "dna hang cua snippets", "dna hanh sua 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: (((("dna hanh cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dna hanh cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dna hanh cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dna hanh cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.