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