Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu tap cho snippets" » "thu thap cho snippets", "thuc tap cho snippets", "thu tai cho snippets", "thu tap co snippets", "thu cap cho snippets", "thu tap chi 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 tap cho 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 tap cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu tap cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu tap cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.