Perhaps you should try some spelling variations:
kiem thuat » ki thuat, kiem thu, diem thuan
hoc chuyen » khong chuyen
thuat sach » thuat lanh, thuat san
sach tren » sach tien, sach tranh
tren hoc » truyen hoc, trung hoc, triet hoc
sach hoa » sach ha, sach hoi, bach hoa
hoa phan » hoa dan, co phan
so sach » so sanh, bo sach, co sach
dau may » dat may, dau cay, dau xay
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: so sach tren hoc chuyen đe ky thuat: kiem thuat sach hoa phan ((dau may) OR (dam may)) tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach tren hoc chuyen đe ky thuat: kiem thuat sach hoa phan ((dau may) OR (dam may)) tinh".
• Adding a wildcard symbol may retrieve word variants: so sach tren hoc chuyen đe ky thuat: kiem thuat sach hoa phan ((dau may) OR (dam may)) tinh*.