Perhaps you should try some spelling variations:
phan xuong » phan cong
hoc chuyen » khong chuyen
sach dong » sach dung, sach song, sach rong
thuc bach » truc bach, thuc cach, thuoc sach
bach khoa » anh khoa
phan cung » phan cong, phan ung, phan quang
dong hoc » dong co, dong luc
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 dong hoc chuyen đe ky thuat: kien thuc bach khoa ((phan cung) OR (phan xuong)) may tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach dong hoc chuyen đe ky thuat: kien thuc bach khoa ((phan cung) OR (phan xuong)) may tinh".
• Adding a wildcard symbol may retrieve word variants: tu sach dong hoc chuyen đe ky thuat: kien thuc bach khoa ((phan cung) OR (phan xuong)) may tinh*.