Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cac kieu so snippets" » "cach tieu so snippets", "cac yeu so snippets", "tac kiem so snippets", "cac hieu so snippets", "cac lieu so snippets", "cac kieu o 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: (((("cac kieu 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: (((("cac kieu so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cac kieu so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac kieu so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.