Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi quyen so snippets" » "thi huyen so snippets", "thi xuyen so snippets", "thi tuyen so snippets", "thi quyen su snippets", "thi quyen 1 snippets", "thi quyen 2 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: (((("thi quyen 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: (((("thi quyen so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi quyen so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi quyen so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.