Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
tranh quan » tranh quang, trinh quan, tranh luan
quan dung » quang dung, quan duong, qua dung
chao chu » cho chu, cua chu, cao cho
chu xanh » chu manh, chieu xanh, chua xang
cong tan » cong tac, cong san, cong ty
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: chao chu xanh - canh tranh quan dung ((cong tan) OR (cong thanh)) ((toan ban) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao chu xanh - canh tranh quan dung ((cong tan) OR (cong thanh)) ((toan ban) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "chao chu xanh - canh tranh quan dung ((cong tan) OR (cong thanh)) ((toan ban) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: chao chu xanh - canh tranh quan dung ((cong tan) OR (cong thanh)) ((toan ban) or (toan tap))*.