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