Perhaps you should try some spelling variations:
hoc chuyen » khong chuyen
sach sinh » sach kinh, sach danh, sach song
khoa than » khoa luan, hoa thai, hoa tan
toc sach » hoc sach, doc sach, thuoc sach
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
than man » than ma, thanh san, tran manh
may minh » mai minh, van minh, cao minh
tinh » trinh, dinh, kinh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach sinh hoc chuyen đe ky thuat: kien thuc anh khoa than man ((may minh) or (may tinh))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach sinh hoc chuyen đe ky thuat: kien thuc anh khoa than man ((may minh) OR (may tinh)).
• Adding a wildcard symbol may retrieve word variants: toc sach sinh hoc chuyen đe ky thuat: kien thuc anh khoa than man ((may minh) or (may tinh))*.