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