Perhaps you should try some spelling variations:
"bo sach ngan hay huyet hoc hoc" » "bo sach ngon hay huyet hoc hoc", "bo sach nha hay huyet hoc hoc", "bo sach han hay huyet hoc hoc", "bo sach ngan cay huyet hoc hoc", "bo sach ngan thay thuyet hoc hoc", "bo sach ngan bam huyet hoc hoc", "bo sach ngan han huyet hoc hoc", "bo sach ngan hang huyet hoc hoc", "bo sach nganh xay huyet hoc hoc", "co sach ngan hay huyet hoc hoc", "hoc sach ngan hay huyet hoc hoc", "bo sach ngan hay huyet hoc hoa", "bo sach ngan hay huyet toc hoc", "bo sach ngan hay huyet hoc hoi"
"su sach danh ky thuat mo hoc" » "su sach tranh ky thuat mo hoc", "su sach dao ky thuat mo hoc", "su sach dung ky thuat mo hoc", "su sach danh ky thuat moi hoc", "su sach danh ky thuat do hoc", "su sach danh ky thuat o hoc", "so sach danh ky thuat mo hoc", "vu sach danh ky thuat mo hoc", "su sach hanh ky thuat mo hoc", "su sach dan ky thuat mo hoc", "su sach dang ky thuat mo hoc", "su sach danh ky thuat mon hoc", "su sach danh ky thuat co hoc"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("bo sach ngan hay huyet hoc hoc") or ("su sach danh ky thuat mo hoc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach ngan hay huyet hoc hoc") OR ("su sach danh ky thuat mo hoc")).
• Removing quotes may allow a broader search: (( bo sach ngan hay huyet hoc hoc ) or ( su sach danh ky thuat mo hoc )).
• Adding a wildcard symbol may retrieve word variants: (("bo sach ngan hay huyet hoc hoc") or ("su sach danh ky thuat mo hoc"))*.