Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phuong hoang
chieu lang » chieu sang, hieu lang, chi lang
hanh tranh » hanh trinh, hanh trang, lanh tranh
phung cong » nhung cong, phong cong, nhung chong
ho chieu » theo chieu, hoc thieu, doi chieu
dan toan » van toan, dan than, manh toan
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: ho chieu lang - ((hanh tranh) or (canh tranh)) cac ((phuong cong) OR (phung cong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu lang - ((hanh tranh) OR (canh tranh)) cac ((phuong cong) OR (phung cong)) dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu lang - ((hanh tranh) or (canh tranh)) cac ((phuong cong) OR (phung cong)) dan toan ban".
• Adding a wildcard symbol may retrieve word variants: ho chieu lang - ((hanh tranh) or (canh tranh)) cac ((phuong cong) OR (phung cong)) dan toan ban*.