Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khat hat doi snippets" » "khat ha doi snippets", "thuat hat doi snippets", "khac hau doi snippets", "khat hoat doi snippets", "khat thay doi snippets", "khat hang doi 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: (((("khat hat doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khat hat doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khat hat doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khat hat doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.