Perhaps you should try some spelling variations:
nhung cong » hang cong, nhung don, nhung lang
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
dung cong » dung trong
hoc hieu » hoc thieu, hoc hien, doc hieu
dan toan » van toan, dan than, manh toan
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: hoc hieu lang - hanh tranh cua ((((nhung cong) or (thong cong))) or (dung cong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - hanh tranh cua ((((nhung cong) OR (thong cong))) OR (dung cong)) dan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - hanh tranh cua ((((nhung cong) or (thong cong))) or (dung cong)) dan toan ban*.