Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
quan trinh » qua trinh, quan tinh, quang thinh
xuan trinh » qua trinh, xuan dinh, xuan kinh
doi chieu » doc hieu, doi chi, mot chieu
dung cong » dung trong
cong tap » cuong tap, cong tac, cong tan
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - anh ((quan trinh) or (xuan trinh)) dung cong tap ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - anh ((quan trinh) OR (xuan trinh)) dung cong tap ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - anh ((quan trinh) or (xuan trinh)) dung cong tap ((toan cau) or (toan tap))*.