Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
phan duong » phan dong, han duong, phan dung
phan xuong » phan cong
sach tren » sach tien, sach tranh
tren hoc » truyen hoc, trung hoc, triet hoc
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
tu sach » thu sach, su sach, te sach
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: tu sach tren hoc chuyen đe ky thuat: kien thuc anh khoa ((phan duong) OR (phan xuong)) may tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tren hoc chuyen đe ky thuat: kien thuc anh khoa ((phan duong) OR (phan xuong)) may tinh".
• Adding a wildcard symbol may retrieve word variants: tu sach tren hoc chuyen đe ky thuat: kien thuc anh khoa ((phan duong) OR (phan xuong)) may tinh*.