Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khieu hai so snippets" » "khieu nai so snippets", "thiet hai so snippets", "hiep hai so snippets", "khieu dai so snippets", "khieu tai so snippets", "khieu thai son 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: (((("khieu hai so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khieu hai so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khieu hai so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khieu hai so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.