Perhaps you should try some spelling variations:
tinh khong » tinh khang, tinh huong, benh khong
thuc hang » thuc hanh, thu hang, phuc hang
hang khoa » dung khoa
khoa pha » khoa phau, khoa ha, khoa phu
pha cung » phan cung, phap cung, nha cung
cung may » dung may, cong may, cung hay
may dinh » may tinh, mai dinh, my dinh
su sach » vu sach
so sach » so sanh, bo sach, co 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) OR (so sach)) tinh khong chuyen đe ky thuat: kien thuc hang khoa pha cung may dinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) tinh khong chuyen đe ky thuat: kien thuc hang khoa pha cung may dinh".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) tinh khong chuyen đe ky thuat: kien thuc hang khoa pha cung may dinh*.