Perhaps you should try some spelling variations:
than thuong » thanh thuong, phan thuong, han thuong
hoc chuyen » khong chuyen
than thong » toan thong, tran thong, nhan thong
sach song » sach dung
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoa » bach khoa, cac khoa, cac khoan
song hoc » dong hoc, song ho, song hong
su sach » so sach, vu 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: su sach song hoc chuyen đe ky thuat: kien thuc cach khoa ((than thong) OR (than thuong)) may tinh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach song hoc chuyen đe ky thuat: kien thuc cach khoa ((than thong) OR (than thuong)) may tinh".
• Adding a wildcard symbol may retrieve word variants: su sach song hoc chuyen đe ky thuat: kien thuc cach khoa ((than thong) OR (than thuong)) may tinh*.