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