Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
khoan than » khoan thanh, khoa than, khan than
sach tien » sach tren, sach thieu
than cong » thanh cong, thuan cong, phan cong
tien hoc » tin hoc, tien hoa, dien hoc
thuc cac » thuc cach, tuc cac, phuc cac
may dinh » may tinh, my dinh, xac dinh
mai dinh » mai dich, tai dinh, mai minh
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 tien hoc chuyen đe ky thuat: kien thuc cac khoan than cong ((may dinh) OR (mai dinh))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tien hoc chuyen đe ky thuat: kien thuc cac khoan than cong ((may dinh) OR (mai dinh))".
• Adding a wildcard symbol may retrieve word variants: su sach tien hoc chuyen đe ky thuat: kien thuc cac khoan than cong ((may dinh) OR (mai dinh))*.