Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu van cai snippets" » "hieu va cai snippets", "thien van cai snippets", "lieu va cai snippets", "hieu van hai snippets", "hieu van chi snippets", "hieu van cau 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: (((("hieu van cai snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hieu van cai snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu van cai snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu van cai snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.