Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
trung cap » truong cao, trung tam
dung cua » dung luan, dung cho
cong tam » cong tac, cong tan, cong nam
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - hanh ((dung cua) or (trung cap)) nhung cong tam ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh ((dung cua) OR (trung cap)) nhung cong tam ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh ((dung cua) or (trung cap)) nhung cong tam ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh ((dung cua) or (trung cap)) nhung cong tam ((toan cau) OR (toan ban))*.