Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nho tap cho snippets" » "nho tai cho snippets", "nho tac cho snippets", "khoa tap cho snippets", "nho tap co snippets", "nho cap cho snippets", "nho tap chi 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: (((("nho tap cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nho tap cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nho tap cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nho tap cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.