Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
doanh khoa » toan khoa
sach thuc » cach thuc, sach thu, sach thue
thuc tiep » thuc tien, truc tiep, thuc hien
tiep bach » vien bach, tien bac, tiep bai
bach khoa » anh khoa
hoc thong » hoc thuong, hoc trong, hoc hong
hoach tai » hoach toi, hoach toan, hoach thay
khoa hoc » hoa hoc
tu doanh » su doanh, te doanh, ty doanh
khoa he » hoa he, khong he, khoa thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thuat sach thuc tiep bach khoa hoc thong ) OR ( thu hoach tai tu doanh khoa he thong ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thuat sach thuc tiep bach khoa hoc thong ) OR ( thu hoach tai tu doanh khoa he thong ))".
• Adding a wildcard symbol may retrieve word variants: (( thuat sach thuc tiep bach khoa hoc thong ) OR ( thu hoach tai tu doanh khoa he thong ))*.