Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"boc van du snippets" » "hoc van du snippets", "oc van du snippets", "bach van du snippets", "boc van duy snippets", "boc van dau snippets", "boc van de 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: (((("boc van du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("boc van du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( boc van du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("boc van du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.