Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cac hoc me snippets" » "cach hoc me snippets", "cac hop me snippets", "bac hoc me snippets", "cac hoc mes snippets", "cac hoc ma snippets", "cac hoc he 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 hoc me 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 hoc me snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cac hoc me snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac hoc me snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.