Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoang hat ca snippets" » "hoang nhat ca snippets", "hoang hai ca snippets", "hoang ha ca snippets", "hoang hat cua snippets", "hoang tat ca snippets", "hoang hat va 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: (((("hoang hat ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoang hat ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoang hat ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoang hat ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.