Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
khoa thuan » khoa than, hoa thuan, khoa luan
thuan cong » thuat cong, thuan phong, thuan trong
sach sinh » sach kinh, sach danh, sach song
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
tu sach » thu sach, su sach, te sach
cong ma » cuong ma, cong ha, cong va

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 anh khoa thuan cong ma (tinh or trinh)~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach sinh hoc chuyen đe ky thuat: kien thuc anh khoa thuan cong ma (tinh OR trinh).
• Adding a wildcard symbol may retrieve word variants: tu sach sinh hoc chuyen đe ky thuat: kien thuc anh khoa thuan cong ma (tinh or trinh)*.