Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
chiet tach » chieu sach
cua phuong » cuu phuong, cuc phuong, luan phuong
doi chiet » doi chieu, doi chi, doi viet
tranh cua » doanh cua, manh cua
hai tap » hai thap, bai tap, lai tap
hai tan » hai van, hai quan
han tap » han tai, toan tap, nhan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chiet tach - canh tranh cua phuong cong ((((hai tap) or (hai tan))) or (han tap)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - canh tranh cua phuong cong ((((hai tap) OR (hai tan))) OR (han tap)) cau.
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - canh tranh cua phuong cong ((((hai tap) or (hai tan))) or (han tap)) cau*.