Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung lang
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
hieu xanh » chieu xanh, hieu manh, hieu nganh
tranh cua » doanh cua, manh cua
nhung don » nhung van, nhung bo
doc hieu » toc thieu, hoc thieu, hoc hien
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - hanh tranh cua ((((nhung cong) or (nhung don))) or (thong cong)) tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh tranh cua ((((nhung cong) OR (nhung don))) OR (thong cong)) tan toan cao.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh tranh cua ((((nhung cong) or (nhung don))) or (thong cong)) tan toan cao*.