Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nae lieu hoc snippets" » "vat lieu hoc snippets", "tai lieu hoc snippets", "bac lieu hoc snippets", "nae lieu khoa snippets", "nae li 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: (((("nae lieu hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nae lieu hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nae lieu hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nae lieu hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.