Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den lang cua snippets" » "den nang cua snippets", "den bang cua snippets", "ten lang cua snippets", "den mang cua snippets", "den hang cua snippets", "den long cua 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 lang cua 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 lang cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den lang cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den lang cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.