Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"python using java snippets" » "python using data snippets", "python using java slippers"
"kiem tra 03 snippets" » "kiem tra 01 snippets", "kiem tra 02 snippets", "kiem tra 04 snippets", "kien tra 03 snippets", "kim tra 03 snippets", "kiem tra 03 slippers"

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: (((("kiem tra 03 snippets") or ("python using java snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("kiem tra 03 snippets") OR ("python using java snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( kiem tra 03 snippets ) or ( python using java snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kiem tra 03 snippets") or ("python using java snippets"))) or ("locating bugs code snippets"))*.