Perhaps you should try some spelling variations:
tinh khong » tinh khang, benh khong, tinh hung
tinh huong » dinh huong, tinh quang, anh huong
thuc hang » thuc hanh, thu hang, phuc hang
hang khoa » dung khoa
khoa phap » khoa phau, khoan phai, khong phap
phap cong » phan cong, pham cong, phap phong
cong may » cong xay, cong ma, cong hay
may dinh » may tinh, mai dinh, my dinh
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: so sach ((tinh khong) OR (tinh huong)) chuyen đe ky thuat: kien thuc hang khoa phap cong may dinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((tinh khong) OR (tinh huong)) chuyen đe ky thuat: kien thuc hang khoa phap cong may dinh".
• Adding a wildcard symbol may retrieve word variants: so sach ((tinh khong) OR (tinh huong)) chuyen đe ky thuat: kien thuc hang khoa phap cong may dinh*.