Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chon van que snippets" » "chon va que snippets", "thong van que snippets", "phong van que snippets", "chon van quy snippets", "chon van due snippets", "chon van hue 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: (((("chon van que snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chon van que snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chon van que snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chon van que snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.