Perhaps you should try some spelling variations:
trien thuong » trien phuong, tin thuong, dien thuong
thuong sach » thuong mach, duong sach, thuoc sach
hoc chuyen » khong chuyen
sach tranh » canh tranh
sach tren » sach tien
sach hoa » sach ha, sach hoi, bach hoa
dan dang » dang dang, dan dung, da dang
dang xay » dang van, van xay
xay tinh » may tinh, xa tinh, tay tinh

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) OR (sach tranh)) hoc chuyen đe ky thuat: trien thuong sach hoa dan dang xay tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach tren) OR (sach tranh)) hoc chuyen đe ky thuat: trien thuong sach hoa dan dang xay tinh".
• Adding a wildcard symbol may retrieve word variants: su ((sach tren) OR (sach tranh)) hoc chuyen đe ky thuat: trien thuong sach hoa dan dang xay tinh*.