Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh tranh » canh tranh, hanh trinh, hanh trang
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
dan van » dang van, doan van, tan van
dao van » do van, dang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - hanh tranh cua thong cong ((dan van) or (dao van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - hanh tranh cua thong cong ((dan van) OR (dao van)) ban.
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - hanh tranh cua thong cong ((dan van) or (dao van)) ban*.