Perhaps you should try some spelling variations:
triet khong » tien khong, triet trong, trien phuong
trinh khong » tinh khong, trinh khung, thinh khong
hang khoa » dung khoa
khoa phan » hoa phan, khoa than, khoa phau
phan cung » phan cong, phan ung, phan xuong
kien thi » dien thi, kien chi, kien tri
thi hang » thi hanh, thi nang, thi hong
cung may » dung may, cong may, cung hay
tu sach » thu sach, su sach, te sach
tinh » dinh, minh, kinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((triet khong) OR (trinh khong)) chuyen đe ky thuat: kien thi hang khoa phan cung may tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((triet khong) OR (trinh khong)) chuyen đe ky thuat: kien thi hang khoa phan cung may tinh".
• Adding a wildcard symbol may retrieve word variants: tu sach ((triet khong) OR (trinh khong)) chuyen đe ky thuat: kien thi hang khoa phan cung may tinh*.