Perhaps you should try some spelling variations:
kien thuoc » kien thuc, bien thuoc, trien thuoc
hoa truyen » co truyen
sach dien » mach dien, sach tien, dich dien
sach khoa » sach nha, anh khoa, sinh khoa
bach khoa » anh khoa
luan cong » luat cong, luong cong, luan chung
cong may » cong xay, cong ma, cong hay
tu sach » thu sach, su sach, te sach
tinh » trinh, dinh, minh

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach dien hoa truyen đe ky thuat: kien thuoc ((sach khoa) OR (bach khoa)) luan cong may tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach dien hoa truyen đe ky thuat: kien thuoc ((sach khoa) OR (bach khoa)) luan cong may tinh".
• Adding a wildcard symbol may retrieve word variants: tu sach dien hoa truyen đe ky thuat: kien thuoc ((sach khoa) OR (bach khoa)) luan cong may tinh*.