Perhaps you should try some spelling variations:
lanh tranh » canh tranh, lan tranh, hanh trinh
tranh cua » doanh cua, manh cua
dung cong » dung trong
hang cong » dang cong, hang nong, bang cong
doi thi » doi thoi, do thi, doi khi
dan han » dan chan, dan than, dan hanh
han tu » phan tu, hanh tu, ban tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi thi thanh - lanh tranh cua ((dung cong) or (hang cong)) dan han tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi thi thanh - lanh tranh cua ((dung cong) OR (hang cong)) dan han tu.
• Adding a wildcard symbol may retrieve word variants: doi thi thanh - lanh tranh cua ((dung cong) or (hang cong)) dan han tu*.