Perhaps you should try some spelling variations:
tinh khong » tinh khang, tinh huong, tinh hung
benh khong » benh kho
thuc hang » thuc hanh, thu hang, phuc hang
hang khoa » dung khoa
khoa phau » hoa phan, khoa kham, khoa than
phau cung » phan cung, pha cung, phap cung
cung may » dung may, cong may, cung hay
may dinh » may tinh, mai dinh, my dinh
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((tinh khong) OR (benh khong)) chuyen đe ky thuat: kien thuc hang khoa phau cung may dinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tinh khong) OR (benh khong)) chuyen đe ky thuat: kien thuc hang khoa phau cung may dinh".
• Adding a wildcard symbol may retrieve word variants: su sach ((tinh khong) OR (benh khong)) chuyen đe ky thuat: kien thuc hang khoa phau cung may dinh*.