Perhaps you should try some spelling variations:
duong cong » dung cong, luong cong, duong trong
cong vang » cong lang, cong quang, cong ngang
ho chinh » hoc chinh, cho chinh, hoa chinh
tranh va » tranh van, trang va, trinh va
va duong » van duong, va tuong, va huong
tai tap » bai tap, tai tao, lai tap
hai tap » hai thap, bai tap, han tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chinh sach - canh tranh va duong cong vang ((tai tap) or (hai tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chinh sach - canh tranh va duong cong vang ((tai tap) OR (hai tap)).
• Adding a wildcard symbol may retrieve word variants: ho chinh sach - canh tranh va duong cong vang ((tai tap) or (hai tap))*.