Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
nhung cong » thong cong, hang cong, nhung don
trinh han » trinh quan
dung cong » dung trong
van toan » van tuan, van tan, van thanh
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: toc thieu xanh - hanh trinh han ((nhung cong) or (dung cong)) van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - hanh trinh han ((nhung cong) OR (dung cong)) van toan cao.
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - hanh trinh han ((nhung cong) or (dung cong)) van toan cao*.