Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chinh sua » chinh su, chinh cua, chinh luan
sua nhung » cua nhung, qua nhung, chua nhung
cong tinh » cong trinh, cong vinh, long tinh
chu sach » thu sach, chieu sach, chuc hach
cau sach » cao sach, hau sach, rau sach
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu sach) or (cau sach)) - hanh chinh sua nhung cong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu sach) OR (cau sach)) - hanh chinh sua nhung cong tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chu sach) or (cau sach)) - hanh chinh sua nhung cong tinh toan cau*.