Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong cac so snippets" » "duong cac so snippets", "dong bac so snippets", "dung cac so snippets", "dong cac co snippets", "dong cac bo snippets", "dong cac ho 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: (((("dong cac 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: (((("dong cac so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong cac so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong cac so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.