Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach tien » sach tren, sach thieu
thuc bach » truc bach, thuc cach, thuoc sach
thu sach » tu sach, thuat sach, thuoc sach
tien hoc » tin hoc, tien hoa, dien hoc
bach hoa » bach khoa, bach ha, cach hoan
dung may » dung va, dung tai, dung mo
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: thu sach tien hoc chuyen đe ky thuat: kien thuc bach hoa dan ((dung may) OR (mang may)) tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach tien hoc chuyen đe ky thuat: kien thuc bach hoa dan ((dung may) OR (mang may)) tinh".
• Adding a wildcard symbol may retrieve word variants: thu sach tien hoc chuyen đe ky thuat: kien thuc bach hoa dan ((dung may) OR (mang may)) tinh*.