Perhaps you should try some spelling variations:
phan duong » phan dong, han duong, phan dung
hoc chuyen » khong chuyen
phan xuong » phan cong
sach tien » sach tren, sach thieu
hanh khoa » hang khoa, anh khoa, hanh hoa
tien hoc » tin hoc, tien hoa, dien hoc
tu sach » thu sach, su sach, te sach
thuc » thu
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 tien hoc chuyen đe ky thuat: kien thuc hanh khoa ((phan duong) or (phan xuong)) may tinh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tien hoc chuyen đe ky thuat: kien thuc hanh khoa ((phan duong) OR (phan xuong)) may tinh.
• Adding a wildcard symbol may retrieve word variants: tu sach tien hoc chuyen đe ky thuat: kien thuc hanh khoa ((phan duong) or (phan xuong)) may tinh*.