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