Perhaps you should try some spelling variations:
quoc chuyen » duoc chuyen, thuoc chuyen, hoc chuyen
buoc chuyen » duoc chuyen, thuoc chuyen, hoc chuyen
sach trung » mach trung, sach thuong, sach dung
kien thuoc » kien thuc, bien thuoc, trien thuoc
khang khoa » hang khoa, khang kho, khong khoa
khoa than » khoa luan, hoa thai, hoa tan
than cong » thanh cong, thuan cong, phan cong
te sach » toc sach
cong ha » cong hoa, dong ha, cong tac
ha tinh » va tinh, may tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach trung ((quoc chuyen) OR (buoc chuyen)) đe ky thuat: kien thuoc khang khoa than cong ha tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach trung ((quoc chuyen) OR (buoc chuyen)) đe ky thuat: kien thuoc khang khoa than cong ha tinh".
• Adding a wildcard symbol may retrieve word variants: te sach trung ((quoc chuyen) OR (buoc chuyen)) đe ky thuat: kien thuoc khang khoa than cong ha tinh*.