Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den buoc hoc snippets" » "dat buoc hoc snippets", "den bu hoc snippets", "den hoc hoc snippets", "den duoc hoc snippets", "den quoc hoc snippets", "den buoc khoi 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: (((("den buoc 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: (((("den buoc hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den buoc hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den buoc hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.