Perhaps you should try some spelling variations:
trien thuoc » trien thuc, trien thuong, tri thuoc
hoc chuyen » khong chuyen
sach tren » sach tien, sach tranh
tin thuoc » tin thuong, tin hoc, ban thuoc
tren hoc » truyen hoc, trung hoc, triet hoc
bach hoa » bach khoa, bach ha, cach hoan
dan dang » dang dang, dan dung, da dang
dang xay » dang van, van xay
xay tinh » may tinh, xa tinh, tay tinh
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 tren hoc chuyen đe ky thuat: ((trien thuoc) OR (tin thuoc)) bach hoa dan dang xay tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tren hoc chuyen đe ky thuat: ((trien thuoc) OR (tin thuoc)) bach hoa dan dang xay tinh".
• Adding a wildcard symbol may retrieve word variants: su sach tren hoc chuyen đe ky thuat: ((trien thuoc) OR (tin thuoc)) bach hoa dan dang xay tinh*.