Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc thuat so snippets" » "hoc thuat so snippets", "dich thuat so snippets", "doc chat so snippets", "doc thuat do snippets", "doc thuat o snippets", "doc thuat co 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: (((("doc thuat so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc thuat so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc thuat so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc thuat so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.