Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
hieu quang » thieu quang, hieu quan, hieu qua
hanh trinh » canh tranh, hanh chinh
chong cong » cong cong, thong cong, cuong cong
theo hieu » theo chieu, theo tieu, thien hieu
trinh cua » tinh cua, trinh luat, trinh quan
dan ban » van ban, can ban, dan ba
ban cau » bang cau, ban can, van cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu quang - hanh trinh cua ((phuong cong) or (chong cong)) dan ban cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu quang - hanh trinh cua ((phuong cong) OR (chong cong)) dan ban cau*.