Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khao hat cua snippets" » "khao sat cua snippets", "khao ha cua snippets", "khac hau cua snippets", "khao nhat cua snippets", "khao chat cua snippets", "khao phat 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: (((("khao hat 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: (((("khao hat cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khao hat cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khao hat cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.