Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
theo chieu » theo tieu, ho chieu, theo chu
chieu tinh » trieu tinh, lieu tinh, chau tinh
cong manh » cong danh, duong manh, cong thanh
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
tinh va » trinh van, trinh vat, tinh gia

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 tinh - hanh ((tinh va) or (tich va)) phuong cong manh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu tinh - hanh ((tinh va) OR (tich va)) phuong cong manh ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: theo chieu tinh - hanh ((tinh va) or (tich va)) phuong cong manh ((toan cau) or (toan ban))*.