Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hat chau doc snippets" » "ha chau doc snippets", "lai chau doc snippets", "hat nhan doc snippets", "hat chat doc snippets", "hat cau do snippets", "hat phau hoc 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: (((("hat chau doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hat chau doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hat chau doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hat chau doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.