Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu luat hoi snippets" » "thue luat hoi snippets", "thau luat hoi snippets", "tu luat hoi snippets", "thu luat moi snippets", "thu luat so snippets", "thu luat dai 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: (((("thu luat hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu luat hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu luat hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu luat hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.