Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"qua van cua snippets" » "quan van cua snippets", "qua ban cua snippets", "qua san cua snippets", "qua vang cua snippets", "qua dan 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: (((("qua van 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: (((("qua van cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qua van cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qua van cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.