Perhaps you should try some spelling variations:
nguyen cong » nguyen trong, nguyen quang
quyen cong » quyet song, nguyen cuong, huyen chuong
cong cong » cong dong, trong cong, dang cong
dung cong » dung trong
cac khu » cac thu, cac khoi, cac kieu
ban ke » ban kem, ban ve, ban le
o thu » o thua, ho thu, do thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((quyen cong) or (nguyen cong)) cac khu đe co ban ke o thu ((cong cong) OR (dung cong))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((quyen cong) OR (nguyen cong)) cac khu đe co ban ke o thu ((cong cong) OR (dung cong)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((quyen cong) or (nguyen cong)) cac khu đe co ban ke o thu ((cong cong) OR (dung cong))".
• Adding a wildcard symbol may retrieve word variants: ((quyen cong) or (nguyen cong)) cac khu đe co ban ke o thu ((cong cong) OR (dung cong))*.