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