Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh hang » thanh hang, hang hang, hanh han
va phuong » va thuong, cac phuong
cong tan » cong tac, cong san, cong thanh
toan cau » toan tap, toan tai
toan cao » toan tap
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: theo chieu sach - hanh hang va phuong cong tan ((toan cau) or (((toan cao) or (toan ban))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh hang va phuong cong tan ((toan cau) OR (((toan cao) OR (toan ban)))).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh hang va phuong cong tan ((toan cau) or (((toan cao) or (toan ban))))*.