Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phu khoa can snippets" » "pham khoa can snippets", "cuu khoa can snippets", "phu tho can snippets", "phu khoa cam snippets", "phu khoa cap snippets", "phu 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: (((("phu 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: (((("phu khoa can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phu khoa can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phu khoa can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.