Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hon khoa can snippets" » "hong khoa can snippets", "von khoa can snippets", "hoc khoa can snippets", "hon khoa cam snippets", "hon khoa cap snippets", "hon khoi can 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: (((("hon khoa can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hon khoa can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hon khoa can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hon khoa can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.