Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
cong ngang » cong nhan, cong quang, cong lang
hieu lang » chieu sang, hieu quang, nhieu tang
hanh hang » thanh hang, hanh han, hanh mang
hang hang » nang hang, cang thang, hung thang
va phuong » va thuong, cac phuong
doi hieu » doi chieu, doc hieu, doi hien
tuan cau » toan cau, tuan cu, thuan cam
quan cau » quang cao, toan cau, quan ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - ((hanh hang) or (hang hang)) va phuong cong ngang ((tuan cau) OR (quan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - ((hanh hang) OR (hang hang)) va phuong cong ngang ((tuan cau) OR (quan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi hieu lang - ((hanh hang) or (hang hang)) va phuong cong ngang ((tuan cau) OR (quan cau))".
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - ((hanh hang) or (hang hang)) va phuong cong ngang ((tuan cau) OR (quan cau))*.