Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach tren » sach tien, sach tranh
thuc danh » thuc hanh, thuc dan, chuc danh
tren hoc » truyen hoc, trung hoc, triet hoc
may dinh » may tinh, mai dinh, my dinh
vu sach » vu bach, su sach, vu khach
hoa tan » hoa van, hoa tin, hoa han

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach tren hoc chuyen đe ky thuat: kien thuc danh ((hoa tan) OR (hoa dan)) mang may dinh~".
• Adding a wildcard symbol may retrieve word variants: vu sach tren hoc chuyen đe ky thuat: kien thuc danh ((hoa tan) OR (hoa dan)) mang may dinh*.