Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
va phuong » va thuong, cac phuong
khoan cam » khoa cam, khoan va, phan cam
cong ban » cong bang, cong san, cong tan
khan cap » khan ap, than cap, phan cac

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 - ((thanh tung) or (thanh cong)) va phuong cong ban ((khan cap) OR (khoan cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - ((thanh tung) OR (thanh cong)) va phuong cong ban ((khan cap) OR (khoan cam)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - ((thanh tung) or (thanh cong)) va phuong cong ban ((khan cap) OR (khoan cam))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - ((thanh tung) or (thanh cong)) va phuong cong ban ((khan cap) OR (khoan cam))*.