Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach sinh » sach kinh, sach danh, sach song
thuc bach » truc bach, thuc cach, thuoc sach
bach khoa » anh khoa
phan cung » phan cong, phan xuong, phan quang
phan ung » phan xuong, phan cong
may dinh » may tinh, mai dinh, my dinh
tu sach » thu sach, su sach, te sach

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 sinh hoc chuyen đe ky thuat: kien thuc bach khoa ((phan cung) OR (phan ung)) may dinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach sinh hoc chuyen đe ky thuat: kien thuc bach khoa ((phan cung) OR (phan ung)) may dinh".
• Adding a wildcard symbol may retrieve word variants: tu sach sinh hoc chuyen đe ky thuat: kien thuc bach khoa ((phan cung) OR (phan ung)) may dinh*.